chapter measurement MCQs for entry tests
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1) |
SI unit of heat is: (a) Volt (b) Henry (c) Joule/Carlorie (d) Joule |
D. |
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2) |
The dimensional formula of
modulus of rigidity is: (a) [ML-1T-2] (b) [M0L2T2] (c) [ML2T-1] (d) [ML2T-2] |
A. |
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3) |
Unit of universal gas
constant in SI is: (a) Jmol-1K-1 (b) w/m2k4 (c) W/m-2 (d) J-S |
A. |
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|
4) |
The dimensional formula of
light year is: (a) L (b) M0L0T-1 (c) M-1L3T-2 (d) ML2T-1 |
A. |
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5) |
The unit of inductance is
equivalent to: (a) Henry (b) Conductance (c) Tesla (d) Weber |
A. |
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6) |
The unit of focal power of lens is: (a) Watt (b)
dioptre (c) Kilowatt (d)
horse power |
B |
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7) |
Which of following quantity is expressed as
force per unit area? (a) work (b)
pressure (c) volume (d)
area |
B |
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8) |
Which of following is the smallest unit? (a): Millimeter (b) Angstrom (c) Fermi (d)
Meter |
C |
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9) |
Length
cannot be measured by: (a) Fermi (b) Debye (c) Micron (d)Light year |
B |
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10) |
Identify pairs whose dimensions are
equal; (a) Torque
and work (b) Stress
and energy (c) Force
and stress (a) (d)
Force and work |
A |
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11) |
The motion without consideration of its cause
is studied in: (a) Kinematics (b) Mechanics (c) Statics (a) (d)
modern physics |
A |
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|
12) |
How many wavelength of Kr86 are there in one
meter. (a) 1553164.13 (b) 1650763.73 (c) 2348123.73 (a) (d)
6521893.63 |
B |
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13) |
Which of following quantities has not been
expressed in proper units. (a) (b) Surface
tension = newton/ met- (c) Energy
= kg (d) Pressure
= |
C |
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14) |
Significant figure in 0.00034 are: (a) Five (b) Six (c) Two (d)
Three |
C |
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15) |
The least count is called: (a) Fractional uncertainty (b) absolute uncertainty (c) % age uncertainty (d) none |
B |
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16) |
One year is equal to: (a) 4.3x1010 sec (b) 4.4 x 1010 sec (c) 3.12 x 107sec (d) 302x106 sec |
C |
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|
17) |
Distance to the nearest galaxy is: (a) 1010m (b)
1019m (c) 1030m (d)
1035 m |
C |
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18) |
The study of physics deals
with (a) the laws of motion (b) the structure of space and
time (c) the forces present in the
universe (d) all of the above |
(D) |
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|
19) |
The
branch of science which deals with the study of matter and energy and the relationship
between them is called (a)
Astronomy (b) Geology (c) Biology (d) Physics |
(D) |
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20) |
Which
of the following main frontier of fundamental sciences? (a) the world of the extremely large things (b) The world of extremely small things (c) The world of middle size things (d) All of above |
(D) |
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21) |
Practice
physics concern with (a) Motion (b) Particles of the matter (c) Automatic nuclei (d) Material |
(B) |
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22) |
Computer
chips are made of (a)
Silicon (b)
Germanium (d)
Cadmium (d) None of
these |
(A) |
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23) |
When
does an international committee agree on a set of definition of units? (a)
1910 (b)
1940 (c)
1960 (d)
1965 |
(C) |
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24) |
The
system international (SI) is built up from (a)
Basic Unit (b)
Supplementary units (c)
Derived units (d) all of
above |
(D) |
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|
25) |
Supplementary
SI units radian and steradian was established from (a) Geometrical
quantities (b)
Luminous intensity (c)
Electric current (d) Temperature |
(A) |
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|
26) |
Which
is the base unit? (a)
Newton (b)
Steradian (c)
Second (d)
Pascal |
(D) |
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|
27) |
The
kilogram is a unit of (a)
Mass (b)
Area (c)
Density (b)
Weight |
(A) |
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28) |
SI unit
of electric current is (a)
Ampere (b) kelvin (c)
Candela (d) Meter |
(A) |
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29) |
SI
unit of amount of substance is (a)
Mole (b)
Watt (c)
Ampere (d)
Kilogram |
(A) |
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30) |
Radian
is unit of (a)
Plane angle (b) Solid
angle (c)
Area (d)
Both a and b |
(A) |
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31) |
Unit
of work in SI unit is (a)
Newton (b) Dyne (c)
Erg (d)
Joule |
(D) |
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32) |
Unit
of pressure in Si is (a)
Pascal (b)
Newton (c)
Watt (d)
Watt s-1 |
(A) |
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33) |
The
dimensions of force are (a) ML2T2 (b) ML-2T-2 (c) ML-1T-1 (d) MLT-2 |
(D) |
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|
34) |
The
dimension of power are (a) ML2T2 (b) ML2T2 (c) ML2T-1 (d) ML-1T1 |
(C) |
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|
35) |
Work
is measured in Joule while energy is expressed in (a)
Watt (b)
Joule (c)
N.S. (d)
J.S. |
(B) |
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|
36) |
One
alb is equal to (a) 10-18 (b) 10-15 (c) 1018 (d)
1012 |
(A) |
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|
37) |
One
Pico is equal to (a) 10-2 (b) 102 (c) 1018 (d)
10-12 |
(C) |
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|
38) |
One
micro is equal to (a) 10-6 (b)
106 (c) 10-3 (d)
109 |
(A) |
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|
39) |
One
centi is equal to (a) 10-2 (b)
10-3 (c) 102 (d) 104
|
(A) |
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40) |
One
Decca is equal to (a) 101
(b)
103 (c) 10-2 (d)
101 |
(A) |
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41) |
One
mega is equal to (a) 1012
(b) 10-5 (c) 103 (d) 109 |
(A) |
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42) |
One
tera is equal to (a) 1012
(b) 1015 (c) 109 (d) 1015 |
(A) |
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43) |
One
exa is equal to (a) 1018
(b)
1015 (c) 1012 (d)
1020 |
(A) |
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44) |
The
resultant of two forces of magnitude 5N each has also a magritude of 5N, the
angle between the force is (a) 0o
(b)
90o (c)
120-2 (d)
180o |
(C) |
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|
45) |
Signification
figures of 0.1001 are (a) 3 (b) 4 (c) 2 (d) 5 |
(B) |
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46) |
Steradian
is a (a)
basic of untis (b) Derived
unit (c)
Supplementary unit (d)
None of above |
(C) |
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|
47) |
Which expression using SI base units is
equivalent to the volt; a. kg m2
s-1 A-1 b.kg
m s-2 A c.
kg m-2 s-1 A d.
kg m2 s-3 A-1 |
D |
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|
48) |
What is the
circumfrence of the circle whos area is 100p : a. 10p b.
20p c. 10 d.290 |
B |
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49) |
The force of one Newton per meter square is
equal to one. (a) Bar (b)
Atm (c) Pascal (d) Erg. |
C |
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|
50) |
Which of following is unit of Pressure? (a) Kg m s-1 (b) Kg m-1 s-2 (c) Kg m2
s-2 (d)
Kg m-2 s-1 |
B |
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51) |
If p is a
pressure and d is a density then p/dha units of: (a) m2/s2 b) N/m2 (c) Kg/m2 (d)
m3/Kg |
A |
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52) |
Which of
the following is closest to a yard: (a) 0.01 m (b) 0.1 m (c) 1 m (d) 100 m |
C |
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53) |
A student
measure current as 0.5A. which of the following correctly expresses the
result: a. 50Ma b. 50MA c.500mA d. 500MA |
C |
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54) |
The prefix
“tetra” stands for; a. 106
b. 109 c. 10-9 d.
106 |
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55) |
What is the
ratio of 1 Gm/1µm? (a) 10-3 (b) 10-7 (c) 10-18 (d) 1015 |
D |
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56) |
The prefix ‘Pico’ stands for: (a) 106 (b) 109 (c) 10–12 (d) 1012
|
C |
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57) |
9.5 × 1015m
when rounded off 40 is 1016 m which is equal to (a) Tera meter (b) Atto meter (c) Exa meter (d) Light year |
D |
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58) |
The
measurement of physical quantity may be subject to random errors and to
systematic errors. Which statement is
correct? (a) Random
errors are always caused by the person taking the measurement. (b) A systematic
error cannot be reduced (c) Random errors
can be reduced by taking the average of several measurements (d) A
systematic error results in a different reading each time the measurement is
taken. |
C |
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59) |
The number
of significant fiures in the measurement of 5.005x 10-5 s is; a. 2 b.
3 c. 4 d 5 |
C |
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60) |
The
scientific notation of a number 0.0023 is expressed as: A) 2.3 × 10-3
B) 0.023 × 10-2 C)2.3 × 10-4 D) 0.2 × 103 |
A |
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61) |
If 7.635
& 4.81 are two significant numbers, their multiplication in significant
digit is: (a)
36.72435 (b) 36.724 (c) 36.72 (d) 36.7 |
B |
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62) |
The number
of significant figures in 4.0030 is; (a)
Four (b)
Five (c) Two (d) Three |
B |
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63) |
The number
of significant figures in the measurement x = 10.00300; (a) 7 (b) 8 (c) 5 (d) 3 |
A |
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64) |
The number
of significant figures in the measurement of 5.05 ´ 10-3 m/s is; (a) 2 (b) 3 (c) 4 (d) 8 |
B |
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65) |
During the
experiment one measured the mass of Mosquito and fount it 1.20×10–5
Kg. The numbers of significant figures in this case are: (a) Five (b) One (c) Two (d) Three |
D |
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|
66) |
In a
cricket match 500 spectators are counted one by one. How many significant
figures will be there in the final result? (a) 0 (b)
1 (c) 2 (d) 3 |
D |
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67) |
A value for
the acceleration of free fall on earth is given (10+2) ms2. Which
statement is the most correct a. the
value is accurate but not precise b. the
value is both accurate and precise c. the
value is neither precise nor accurate d. the value
is precise but not accurate |
A |
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68) |
The maximum
error in measurement of mass and length of the sides of the cube are 3% and
2% respectively. The maximum error in the measurement of its density is; a. 3% b. 5% c. 6% d. 9% |
D |
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|
69) |
In simple
electrical circuit the current in a resistor is measured as 2.50+0.05mA. the
resistor is marked as having a value of 4.7 a. 2% b. 4% c. 6% d. 8% |
C |
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|
70) |
The power
loss in resistor is culates by formula
P=V2/R. the uncertaniuty in V s 3% and in R is 2%.
Uncertainty in P is: a. 4% b. 7% c. 8% d. 11% |
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|
71) |
A quantity
x is to be determined by the equation x=P-Q. P is measured as 1.27 a. 0.04% b.2% c. 3% d. 7% |
D |
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|
72) |
The
quantity x is to be determined form the equation x = p-Q.nP is measured as
(1.27+ 0.02)m and Q is measured as (0.03 + 0.01)m. What is the percentage
uncertainty in x to one significant figure.
(a) 4% (b) 2% (c) 3% (d)7% |
B |
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|
73) |
The density of the steel ball was determined
by measuring the mass and diameter. The mass was measured with 1% and
diameter 3% of the error. In the calculated density of the steel ball is at
most. (a) 2% (b) 4% (c) 8% (d) 10% |
D |
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|
74) |
The power loss, P in resistor is calculated
using the formula P = V2/R. The uncertainty in the potential
difference V is 3% and the uncertainty in the resistance R is 2%, what is the
uncertainty in P? (a) 4% (b) 7% (c) 8% (d) 11% |
C |
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75) |
The uncertainty recorded in the radius of a
sphere is 1.6%. The uncertainty in the area of that sphere is; (a) 4.8% (b) 3.2% (c) 1.6% d) 0.8% |
B |
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|
76) |
The percentage error in the measurement of
mass and speed are 5% or 6% respectively the maximum error in the measurement
of K.E is:
A) 17% B)
30% C) 15%
D) 90% |
A |
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|
77) |
A precise measurement is one which has; (a) Less uncertainty (b) Max precision (c) Absolute
precision (d) None of these |
A |
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|
78) |
The
dimesnsional formula for change in momentum is same for: a. force b.
impulse c.
acceleration d.
velocity |
A |
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79) |
Suppose
A=BC, where A has the dimesnsion L/M and C has the dimension L/T. then B has
the dimension a. T/M b. L2
/TM c. TM/L2 d. L2
T/M |
A |
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|
80) |
The unit of
planks constant is same is that of: a. angular
momentum b. work c. force d.
torque |
A |
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81) |
Which one of the following is both unitless
and dimentionless a. angle b. solid
angle c.
mechanical equivalent of heat d. refractive
index |
A |
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|
82) |
The dimensions of Planck constant
are; a. [MLT-2]
b. [ML2T-1] c. [MLT-3]
d. [ML2T-2] |
B |
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|
83) |
The Dimension of work are similar to
the dimensions of; (a) Impulse (b) Torque (c) Power (d) Angular momentum. |
B |
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|
84) |
ML-1 T-1are
dimensions of; (a) Augular Momentum (b) Power (c) Impulse (d) Viscosity |
D |
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|
85) |
The dimensions of energy are the
same as those of ; a . Momentum b.
Acceleration c. Force d.
Work |
D |
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|
86) |
The dimensions of the gravitational
constant are: a. [M2L2T] b. [M-1L3T-2] c. [M2L-2T-2] d. [ML-2T-1] |
B |
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|
87) |
The dimensions of torque are: a. [MLT-2] b.
[ML2T2] c. [MLT |
D |
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|
88) |
The dimensions of impulse are similar to the
dimensions of: a. Torque b.
Work c. Momentum d.
Force |
C |
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|
89) |
The dimensions of angular
acceleration are ; a. [L-1T-1] b. [LT-2] c. [T-2] d.[L2T-2] |
C |
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|
90) |
Planck’s constant has the dimension
of: a.
Energy b. Work
c.
Linear momentum d. Angular
momentum |
D |
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|
91) |
M0 L0 T0are
the dimension of (a) Strain (b)
Refractive Index (c) Magnification (d) All |
D |
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|
92) |
The time rate of change of magnetic
flux has the same dimensions as that of: A) Current B) Resistance C) Magnetic induction D) Potential difference |
D |
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|
93) |
Which of the following pairs have
the same units and dimensions? A) Resistance and resistivity B) Conductivity and resistivity C) Electromotive force &
potential difference D) Resistivity & temperature
coefficient of resistivity |
C |
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94) |
Which one is correct formula for
finding the speed, V of ocean waves in terms of the density p of sea water,
the accelaration of free fall g, depth, h of the ocean & the wavelength l?
(a) v = c) v = |
A |
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95) |
Suppose A = BC, where A has the
dimension L/M and C has the dimension L/T. Then B has the dimension: (a) T/M (b) L2/TM (c) TM/L2 (d)
L2T/M |
A |
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|
96) |
Which of the following is a
unit of pressure? a. Kg
ms-1 b. Kgm-1s-2 c. Kgm2s-2 d. Kgm-2s-1 |
B |
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|
97) |
The energy of a photon of
light of frequency is given by hf, where h is the Planck constant. what are
the base units of h? a. Kg
ms-1 b. Kgm2s-1 c. Kgm2s-2 d. Kgm-2s-3 |
B |
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|
98) |
Which of the following
pairs of units are both Si base units? a. Ampere,
degree Celsius b. Ampere
, kelvin c. Coulomb,
degree Celsius d. Coulomb, kelvin |
B |
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|
99) |
Which of the following
could be measured in the same units as force? a. Energy/distance b. Energy
x distance c. Energy/time d. Momentum x distance |
A |
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|
100) |
The following physical
quantities can be either positive or negative. S: displacement of a
particle along a straight line 0: temperature on the
Celsius scale Q: electric charge v: reading on a digital
voltmeter which of these quantities
are vectors? a. S,
0 , q, v b. S
, q, v c. 0
, v d. S only |
D |
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|
101) |
For which quantity is the
magnitude a reasonable estimate? a. Frequency
of a radio wave 500 pHz b. Mass
of an atom 500
c. The young modulus of a metal 500 kPa d. Wavelength
of green light 500 nm |
D |
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|
102) |
Which pair contains one
vector and one scalar quantity? a. Displacement
: acceleration b. Force
: kinetic energy c. Momentum
: velocity d. Power : speed |
B |
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|
103) |
What is the ratio a. 10-3 b. 10-9 c. 10-12 d. 10-15 |
D |
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|
104) |
Which experimental
technique reduces the systematic error of the quantity being investigated? a. Adjusting
an ammeter to remove its zero error before measuring a current b. Measureing
several intermodal distance on a standing wave to find the mean intermodal
distance c. Measureing
the diameter of a wire repeatedly and calculating the average d. Timing a large number of oscilations to find a period |
A |
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|
105) |
Which quantity has different units from the other
three? a. Density
x volume x velocity b. Rate
of change of momentum c. The
young modulus x area d. Weight |
A |
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|
106) |
The unit of work, the joule, may be defined as the work
done when the point of application of a force 1 newton is moved a distance of
1 metre in the direction of the force. Express the joule in terms of the base units of mass,
length and time, the kg. m and s. a. Kg m-1
s2 b. Kg m2
s-2 c. Kg
m2 s-1 d. Kg s-2 |
B |
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|
107) |
The resistance of an
electrical component is measured. The following meter readings are obtained.
What
is the resistance? a. 2.5
b. 2.7 c. 2500 d. 2700 |
A |
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|
108) |
What is the reading shown
on this miliammeter?
a. 2.35
mA b. 2.7
mA c. 3.4
mA d. 3.7 mA |
C |
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|
109) |
Errors in measurement may
be either systematic or random. Which of the following
involves random error? a. Not
allowing for zero error on a moving coil voltmeter b. Not
subtracting background count rate when determining the count rate from a
radioactive source c. Stopping
a stopwatch at the end of a race d. Using the value of g as 10 n kg-1 when
calculating weight from mass. |
C |
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|
110) |
A micrometer, reading to +
0.01 mm, gives the following resuts when used to measure the diameter d of a
uniform wire: 1.02 mm 1.02 mm 1.01 mm
1.02 mm 1.02 mm When the wire is removed
and the jaws are closed, a reading of -0.02 mm is obtained. Which of the following
gives the value of d with a precision appropriate to the micrometer? a. 1.0
mm b. 1.00
mm c. 1.038
mm d. 1.04 mm |
D |
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|
111) |
A student makes
measurements from which she calculating the speed of sound as 327.66 ms-1.
She estimates that her result is accurate to + 3%. Which of the
following gives her result expressed to the appropriate number of significant
figures? a. 327.7
ms-1 b. 328
ms-1 c. 330
ms-1 d. 300 ms-1 |
C |
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|
112) |
A metal sphere of radius r
is dropped into a tank of water. As it sinks at speed v, it experiences a
drag force F given by F = krv, where k is a constant. What are the SI unit of k? a. Kg
m2s-1 b. Kg
m-2s-2 c. Kg
m-1s-1 d. Kg ms-2 |
C |
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|
113) |
An Olympic athlete of mass
80 kg competes in a 100 m race. What is the best estimate
of his mean kinetic energy during the race? a. 4
x 10² J b. 4
x 10³ J c. 4
x 104 J d. 4 x 105 J |
B |
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|
114) |
In a simple electrical
circuit, the current in a resistor is measured as (2.50 + 0.05) mA.
The resistor is marked as having a value of 4.7 a. 2% b. 4% c. % d. 8% |
C |
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|
115) |
When comparing systematic
and random errors, the following pairs of properties of errors in an experimental
measurement may be contrasted: P1 : error can
possibly be eliminated P2: error cannot
possibly be eliminated O1: error is of
constant sign and magnitude O2: error is of
varying sign and magnitude R1: error will
be reduced by averaging repeated measurements R2: error will
not be reduced by averaging repeated measurements Which properties apply to
random errors? a. P1
, Q1 , R2 b. P1
, O2, R2 c. P2,
O2 , R1 d. P2, O1 , R1 |
C |
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|
116) |
Argon and neon are
monatomic gases. One mole of argon has mass 40 g and one mole of neon has
mass 20 g. What is the ratio a. Always
1 b. Always
2 c. 1,
only if both gases are at the same temperature and pressure d. 2, only if both gases are at the same temperature and
pressure |
A |
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|
117) |
An instrument gives a
numerical reading of 0.00160 + 0.00005. Which statement is correct? a. The
actual uncertainly is 5. b. The
fractional uncertainly is 5 x 10-5 c. The fractional uncertainly is d. The percentage uncertainly is 3% |
D |
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|
118) |
Each diagram shows three
vectors of equal magnitude. In which diagram is the
magnitude of the resultant vector different from the other three?
|
C |
||||||||
|
119) |
A steel rule can be read to
the nearest milimetre. It is used to measure the length of a bar whose true
length is 895 mm. repeated measurements give the following reading.
Are the reading accurate
and precise to withing 1 mm?
|
b |
||||||||
|
120) |
In an experiment, a
radio-controlled car takes 2.50 + 0.05 s to travel 40.0 + 0.1
m. What is the cars average
speed and the uncertainly in this value? a. 16
+ms-1 b. 16.0
+ 0.2 ms-1 c. 16.0
+ 0.4 ms-1 d. 16.00 + 0.36 ms-1 |
c |
||||||||
|
121) |
The power loss P in a
resistor is calculated using the formula
The uncertainly in the
potential difference V is 3% and the uncertainly in the resistance R is 2% What is the uncertainly in
P? a. 4% b. 7% c. 8% d. 11% |
C |
||||||||
|
122) |
Decimal sub-multiples and
multiples of units are indicated using a prefix to the unit. For example, the
prefix mili (m) represents 10-3. Which of the following
gives the sub-multiples or multiples represented by pico (p) and giga (G)?
|
c |
||||||||
|
123) |
The dimensions of a cube
are measured with vernier calipers.
The
measured length of each side is 30 mm. if the vernier calipers can be read
with an uncertainly of + 0.1 mm. what does this give for the
approximate uncertainly in the value of its volume? a. b. c. d. |
D |
||||||||
|
124) |
The relation between the
energy E of a photon and its wavelength E = Where K is a constant. When E is measured in
electronvolts and a. 3.18
x 10-53 b. 3.18 x 10-35 c. 1.24
x 10-15 d. 1.24 x 103 |
D |
||||||||
|
125) |
A radio aerial of length L,
when the current is l, emits a signal of wavelength P = kl² Where k is a constant What unit, if any, should
be used for the constant k? a. Volt b. Ohm c. Watt d. No unit |
B |
||||||||
|
126) |
Which expression could be
correct for the velocity v of ocean waves in terms of p the density of
seawater, g the acceleration of free fall, h the depth of the ocean and a. b. c. d. |
a |
||||||||
|
127) |
The manufacturers of a
digital voltmeter give, as its specification, Accuracy + 1% with
an additional uncertainly of + 10 mV. The meter reads 4.072 V. How should this reading be
recorded, together with its uncertainly? a. (4.07
+ 0.01) V b. (4.07
+ 0.04) V c. (4.072
+ 0.052) V d. (4.07 + 0.05) V |
d |
||||||||
|
128) |
A mass of a liquid of
density P is thoroughly mixed with an equal mass of another liquid of density
2P. no change of the total volume occurs. What is the density of the
liquired mixture? a. b. c. d. |
a |
||||||||
|
129) |
A student uses an analogue
voltmeter to measure the potential difference across a lamp. The voltmeter is
marked every 0.02 V but has a zero error of 0.08 V. the student is not aware
of this zero error and writes down a reading of 2.16 V. is the reading
accurate and is it precise?
|
D |
||||||||
|
130) |
A student attempts to
measure the diameter of a steel ball by using a metre rule to measure four
similar balls in a row.
The students estimates the
positions on the scale to be as follows. X (1.0 + 0.2) cm Y (5.0 + 0.2) cm What is the diameter of a
steel ball together with its associated uncertainly? a. (1.0
+ 0.05) cm b. (1.0
+ 0.1) cm c. (1.0
+ 0.2) cm d. (1.0 + 0.24) cm |
b |
||||||||
|
131) |
The e.m.f. induced in a
coil by a changing magnetic flux is equal to the rate of change of flux with
time. Which is a unit for
magnetic flux? a. Kg
m2s-2A-1 b. Kg
m2 s-2 A c. Kg
ms2 A -1 d. Ms-2 A-1 |
a |
||||||||
|
132) |
Which
estimate is realistic? a. The kinetic energy of a bus
travelling on an expressway is 30 000 J. b. The power of a domestic light is
300 W. c. The temperature of a hot oven is
300 K d. The volume of air in a car tyre is
0.03 m3. |
d |
||||||||
|
133) |
Two solid
substances P and Q have atoms of mass MP and MQ
respectively. They have NP and NO atoms per unit
volume. It is found
by experiment that the density of P is greater than that of Q. Which of
the following deductions from this experiment must be correct? a. MP > MQ b. NP > NQ c. MPNP > MQNQ d. |
c |
||||||||
|
134) |
The diagram
shown two pulses on the screen of a cathode-ray oscilloscope. A grid of 1 cm
squares covers the screen. The time base setting is 1
How long
does each pulse last? a. 2 b. 3 c. 4 d. 6 |
a |
||||||||
|
135) |
A boat
changes its velocity from 8 ms-1 due north to 6 ms-1
due east. What is its
change in velocity? a. 2 ms-1 at a direction
of 37° east of north b. 2 ms-1 at a direction
of 53° east of north c. 10 ms-1 at a direction
of 37° east of south d. 10 ms-1 at a direction
of 53° west of south |
c |
||||||||
|
136) |
The equation connecting
object distance u, im-age distance v and local length l for a lens is
A student measures values
of u and v, with their associated uncertainties. These are U = 50 mm +3 mm, V = 200 mm + 5 mm He calculates the value of
f as 40 mm. What is the uncertainty in
this value? a. +
2.1 mm b. +
3.4 mm c. +4.5
mm d. + 6.8 mm |
b |
||||||||
|
137) |
Four students each made a
series of measure-ments of the acceleration of free fall g. the table shows
the results obtained. Which student obtained a
set of results that could be described as precise but not accurate? Student results, g/ms-2 a. 9.81 9.79 9.84 9.83 b. 9.81 10.12 9.89 8.94 c. 9.45 9.21 8.99 8.76 d. 8.45 8.46 8.50 8.41 |
d |
||||||||
|
138) |
A quantity x is measured
many times and the number N of measurements giving a value x is plotted
against x. the true value of the quantity is xo. Which graph best represents
precise measurements with poor accuracy?
|
b |
||||||||
|
139) |
An object of mass 1.000 kg
is placed on four different balances. For each balance, the reading is taken
five times. The table shows the value
obtained together with the means. Which balance has the
smallest systematic error but is not very precise.
|
b |
||||||||
|
140) |
The density of the material
of a rectangular block was determined by measuring the mass and linear
dimensions of the block. The table shows the results obtained, together with
their uncertainties. Mass = (25.0 + 0.1) g Length = (5.00 + 0.01) cm Breadth = (2.00 + 0.01) cm Height = (1.00 + 0.01) cm The density was calculated
to be 2.50 g cm-3. What was the uncertainly in this results? a. +
0.01 g cm-3 b. +
0.02 g cm-3 c. +
0.05 g cm-3 d. + 0.13 g cm-3 |
c |
||||||||
|
141) |
The resistance R of an
unknown resistor is found by measuring the potential difference V across the
resistor and the current / through it and using the equation R = What is the uncertainly in
the calculated resistance? a. 1.5% b. 3% c. 5% d. 6% |
c |
||||||||
|
142) |
Two pulses are displayed on
the screen of a cathode-ray oscilloscope. The grid marking indicate intervals
of 1 cm on the screen. When the time base is set
at 0.50 mscm-1, the screen display is as shown in P.
What time base setting is
needed to make these pulses produce the display shown in Q? a. 0.20
ms cm-1 b. 1.00
ms cm-1 c. 1.25
ms cm-1 d. 2.50 ms cm-1 |
c |
||||||||
|
143) |
Calibration curves showing
the variation with Potential difference V of the deflection 0 of the pointer
of four different voltmeters are given below. Which meter gives the
largest regular change per unit potential difference at 2.5 V?
|
d |
||||||||
|
144) |
A projectile is fired at an
angle a to the horizontal at a speed u, as shown.
What will be the vertical
and horizontal components of its velocity after a time ? assume that air
resistance is negligible. The acceleration of free fall is g.
|
B |
||||||||
|
145) |
A student measure the time
t for a ball to fall from rest through a vertical distance h. knowing that
the equation h =
Which of the following is
an explanation for the intercept on the t axis. a. Air
resistance has not been taken into account for larger values of h. b. There
is a constant delay between starting the timer and releasing the ball. c. There
is an error in the timer that consistently makes it run fast. d. The student should have plotted h against t². |
c |
||||||||
|
146) |
In an experiment to
determine the acceleration of free fall g, the period of oscillation t and
length l of a simple pendulum were measured. The uncertainly in the
measurement of l was estimated to be 4% and that of T, 1%. The value of g was
determined using the formula G = What is the uncertainly in
the calculated value for g? a. 2% b. 3% c. 5% d. 6% |
D |
||||||||
|
147) |
In an experiment to measure
the viscosity
Where r = (0.83 + 0.01) mm V = (0.065 + 0.002) ms-1, K is a constant of value
93.7 Nm-3 How should the value of a. (9.93
+ 0.54) x 10-4 Nsm-2 b. (9.9
+ 0.6) x 10-4 Nsm-2 c. (9.93
+ 0.42) x 10-4 Nsm-2 d. (9.9 + 0.4) x 10-4 Nsm-2 |
b |
||||||||
|
148) |
Potential
difference may be compared by using a potentiometer, with a galvanometer as
an indicator. The potential differences are adjusted until the galvanometer
reads zero. This is an example of a null method. Which
statement about null methods is incorrect? a. Null
methods are most suitable for the measurement of rapidly varying quantites. b. Null
methods can give only relative, and not absolute values. c. The
indicator in a null method need not be calibrated. d. The indicator in a null method need not have a linear
response. |
A |
||||||||
|
149) |
The
Y-input terminals of an oscilloscope are connected to a supply of peak value
5.0 V and of frequency 50 Hz. The time-base is set at 10 ms per division and
the Y-gain at 5 V per division. Which
trace could be obtained?
|
d
|
||||||||
|
150) |
The
following trace is seen on the screen of a cathode-ray oscilloscope.
The
setting of the time base is then changed from 10 ms cm-1 to 20 ms
cm-1 and the Y-sensitivity is unaltered. Which
trace is now seen on the screen?
|
C |
||||||||
|
151) |
A
picture frame is hung by a cord from a nail.
Which
vector triangle represents the resultant R of the two tension forces T in the
cord?
|
B |
||||||||
|
152) |
A
light meter measures the intensity l of the light falling on it. theory
suggests that this varies at the inverse square of the distance d.
Which
graph of the results supports this theory?
|
d |
||||||||
|
153) |
An
object falls freely from rest and travels a distance s in time t. a graph of
The
gradient of the graph is found to be 0.204 s² m-1. Which
statement about the value obtained for g is correct? a. It
is accurate but not precise. b. It
is both precise and accurate c. It
is neither precise nor accurate d. It is precise but not accurate. |
a |
||||||||
|
154) |
In an experiment,
the width w and the thickness x of a metre rule to be measured as precisely
as possible using normal laboratory apparatus.
Which
combination of instruments is most appropriate for these measurement?
|
d |
||||||||
|
155) |
An
oscilloscope display constant of two separate traces, a waveform and a long
horizontal line. The horizontal line may be taken as the zero level. The
grid on the screen is calibrated in cm squares, the timebase setting is 2.5
ms cm-1, and the Y-sensitivity is 5 mV cm-1.
What
are the period and the peak positive voltage of the waveform in the diagram?
|
C |
||||||||
|
156) |
A wire
of uniform circular cross-section has diameter d and length L. a potential
difference V between the ends of the wire gives rise to current l in the
wire. The
resistivity p of the material of the wire is given by the expression
In one
particular experiment, the following measurements are made. D =
1.20 + 0.01 cm I =
1.50 + 0.05 A L = 100
+ 1 cm V =
5.0 + 0.1 V Which
measurement gives rise to the least un-certainly in the value for the
resistivity? a. D b. I c. L d. V |
c |
||||||||
|
157) |
SI units of gas constant are: a.
Watt K-1mol-1 b.
Joule K-1mol-1 c.
Newton K-1mol-1 Erg K-1mol-1 |
B |
||||||||
|
158) |
The Unit of permittivity of free space a.
Coulomb/newton-metre b.
Coul2/(newton-m)2 c.
Newton-m2/coul2 Coul2/(newton-m2) |
D |
||||||||
|
159) |
The correct unit of thermal conductivity is a.
Joule m-2 sec-1(°C)-1 b.
Joule-sec c.
Joule m-1sec-1(°C)-2 Joule m-1sec-1(°C)-1 |
D |
||||||||
|
160) |
Which of the following is a derived unit a.
Cd b.
A c.
Kgms-1 Mole |
C |
||||||||
|
161) |
The velocity of a particle is given by V = at2 + bt + c If v is measured in ms-1 and t is measured in s, the
unit of c: a.
A is ms-1 b.
C is ms-1 c.
b is ms-1 a and b are same but that of c is different |
B |
||||||||
|
162) |
Which of the following is not measured in the units of energy? a.
Couple x angle turned through b.
Force x distance c.
Moment of inertia x (angular velocity)2 Impulse x time |
D |
||||||||
|
163) |
If x = at + bt2, where x is the distance travelled by
the body in kilometers while t is the time in seconds, then the units of b
are a.
Km/s b.
Km/s2 c.
Kms Kms2 |
B |
||||||||
|
164) |
Unit of magnetic flux are a.
Weber/metre b.
Joule x coul/metre c.
Newton x metre/ampere Tesla |
C |
||||||||
|
165) |
Which of the following is not an inter-disciplinary area of
physics a.
Geo-physics b.
Bio physics c.
Astro-physics Physics of solids |
D |
||||||||
|
166) |
The least count of a stop watch is 0.1 sec. the time of 20 oscillations
of the pendulum is found to be 20 sec. the percentage error in the time
period is a.
0.25% b.
0.75% c.
0.5% 1.0% |
C |
||||||||
|
167) |
Physics is an experimental science and the scientific method
emphasizes on a.
Accurate measurements b.
Uncertain measurements c.
Approximate measurements %age measurements |
A |
||||||||
|
168) |
Steradian is the SI unit of a.
Plane angle b.
Mass c.
Solid angle Force |
C |
||||||||
|
169) |
In the equation a.
N m2 b.
N m4 c.
N m-3 N m-2 |
B |
||||||||
|
170) |
Which is the derived quantity in SI units? a.
Electric current b.
Plane angle c.
Electric charge Amount of substance |
C |
||||||||
|
171) |
The radius of a ball is (5.0 + 0.2) cm. the percentage error in
the volume of the ball is a.
11% b.
7% c.
4% 9% |
A |
||||||||
|
172) |
While measuring the acceleration due to gravity by a simple
pendulum, a student makes a positive error of 1% in the length of the
pendulum and a negative error of 3% in the value of time period. His
percentage error in the measurement of g by the relation g = 4 a.
2% b.
7% c.
4% 10% |
B |
||||||||
|
173) |
An experiment measured quantities a, b, c and then x is
calculated rom x = ab2 / c3. If the percentage errors
in a, b, c are +1^, +3% and +2% respectively, the percentage error in x can
be a.
+13% b.
+4% c.
+7% +1% |
A |
||||||||
|
174) |
If x = a2, then fractional error a.
b.
c.
|
C |
||||||||
|
175) |
The percentage errors in the measurement of mass and speed are 2%
and 3% respectively. How much will be the maximum error in the estimate of
kinetic energy obtained by measuring mass and speed? a.
11% b.
5% c.
8% 4% |
B |
||||||||
|
176) |
Which is not a base unit in SI: a.
Kilogram b.
Kelvin c.
Joule Ampere |
C |
||||||||
|
177) |
Which one of the following is not regarded as a fundamental
quantity in physics? a.
Weight b.
Mass c.
Length Time |
A |
||||||||
|
178) |
Which one of the following is not a derived unit? a.
Frequency b.
Gravitational constant c.
Planck’s constant Electric current |
D |
||||||||
|
179) |
The unit of Stefan’s constant is a.
Wm-2K-1 b.
WmK-4 c.
Wm-2K-4 Nm-2K4 |
C |
||||||||
|
180) |
Which of the following pairs of electrical untis are the units
equivalent? a.
Coulomb; As-1 b.
Pascal : Ns c.
Farad ; C-1V Volt : JC-1 |
D |
||||||||
|
181) |
If “P” is the momentum of an object of mass “m”, the expression a.
Energy b.
Power c.
Force Velocity |
A |
||||||||
|
182) |
Which expression could be correct for the velocity ‘v’ of ocean
wave in terms of ‘p’ the density of sea water, ‘g’ the acceleration of free
fall, ‘h’ the depth of ocean and ‘ a.
c.
|
A |
||||||||
|
183) |
Characteristics for an ideal standard are a.
Variable and non-accessible b.
Invariable and non-accessible c.
Invariable and accessible Variable and accessible |
C |
||||||||
|
184) |
The angle made by an area of a sphere equal to the square of its
radius at its centre is a.
One degree b.
One revolution c.
One radian One steradian |
D |
||||||||
|
185) |
The power loss P in a resistor is calculated using the formula P
= a.
4% b.
7% c.
8% 11% |
C |
||||||||
|
186) |
1 Pascal a.
Kgms-2 b.
Kgm-2s-3 c.
Kgm-1s-2 Kgm-2s-3 |
C |
||||||||
|
187) |
The unit of a.
Time b.
Velocity c.
Energy Force |
A |
||||||||
|
188) |
Which of the following expressions defines power? a.
Force x distance moved in the direction of force b.
Force x velocity c.
Work done Work done x time taken |
C |
||||||||
|
189) |
A thermometer can be read to an accuracy of +0.5°C. this
thermoemeter is used measure a temperature rise from 40°C to 100°C. What is the percentage uncertainty in the measurement of the
temperature rise? a.
0.5% b.
1.3% c.
0.8% 1.7% |
D |
||||||||
|
190) |
The resistance R of a unknown resistor is found by measuring the
potential difference V across the resistor and the current 1 though it and
using the equation R = a.
1.5% b.
5% c.
3% 6% |
B |
||||||||
|
191) |
In the expressions below a is acceleration, F is force, m is
mass, t is time, v is velocity. Which expression represents energy? a.
Ft b.
c.
Fvt
|
C |
||||||||
|
192) |
The measurement of a physical quantity may be subject to random
errors and to systematic errors. Which statement is correct? a.
Random errors can be reduced by taking the average of several
measurements b.
Random errors are always caused by the person taking the
measurement. c.
A systematic error cannot be reduced A systematic error results in a different reading each time the
measurement is taken |
A |
||||||||
|
193) |
An experiment is done to measure the resistance of a wire. The current in the wire is 1.0 + 0.2A and the potential
difference across the wire is 8.0 + 0.4 V. What is the resistance of the wire and its uncertainty? a.
(8.0 + 0.2) b.
(8.0 + 0.6) c.
(8+1) (8+2) |
D |
||||||||
|
194) |
A mass m has acceleration a. it moves through a distance s in
time t. the power used in accelerating the mass is equal to the product of
force and velocity. The percentage uncertainities are 0.1 % in m, 0.2 1% in a, 0.3 1.5% in s, 0.4 0.5% int. 0.5 What is the
percentage uncertainty in the average power? a.
2.1% b.
3.1% c.
2.6% 4.1% |
B |
||||||||
|
195) |
Identify inter disciplinary area of physics a.
Biophysics b.
Particle physics c.
Space physics General relativity |
A |
||||||||
|
196) |
Physical quantity whose definition is based upon other physical
quantity is a.
Current b.
Charge c.
Time Temperature |
B |
||||||||
|
197) |
Identify the base quantity a.
Solar constant b.
Charge c.
Intensity of light All of these |
C |
||||||||
|
198) |
The units of energy per unit time are same as those of a.
Stress b.
Modulus of elasticity c.
Pressure All of these |
D |
||||||||
|
199) |
How many principle characteristics are essential for an ideal
standard for measurement of a base quantity? a.
1 b.
2 c.
3 4 |
B |
||||||||
|
200) |
The student attempt to measure the diameter of a steel ball by
using meter rule to measure four similar ball in a row.
The student estimate the positions on the scale to be as follows.
X (1.0 Y (5.0 What is the diameter of a steel ball together
with its associated uncertainty? a.
b.
( c.
|
C |
||||||||
|
201) |
Steradian is a unit of a.
Plane angle b.
Charge c.
Solid angle Resistance |
C |
||||||||
|
202) |
The unit of a.
R b.
F c.
I V |
B |
||||||||
|
203) |
Which one of the following is not a unit of length a.
Angstrom b.
Micron c.
Radian Light year |
C |
||||||||
|
204) |
Which of the following is not SI base quantity a.
Temperature b.
Mole c.
Length Current |
B |
||||||||
|
205) |
Silicon is abundantly obtained form a.
Water b.
Metal c.
Sand Stones |
C |
||||||||
|
206) |
The electric field is E = a.
Kg ms-2 A-1 b.
Kg m-1 s-2 A-1 c.
Kg m-1 s-3 A-2 Kg m-1 s-3 A-1 |
A |
||||||||
|
207) |
The unit of R/L is same as a.
Decay rate b.
Frequency c.
Decay constant All of these |
D |
||||||||
|
208) |
Which of the following gives the prefixes in increasing order a.
Giga, mega, micro b.
Micro, mega, pico , giga c.
Pico, micro, mega, giga Giga, mega, peco, micro |
C |
||||||||
|
209) |
One nanometer is equal to a.
10-9 mm b.
10-7 cm c.
10-6 cm 109 cm |
B |
||||||||
|
210) |
If ‘h’ is the height and ‘g’ is the acceleration due to gravity,
then the unit of a.
Time b.
Mass c.
Volume Velocity |
A |
||||||||
|
211) |
The dimensional formula of PV, where P is pressure and V is
volume is the same as that of a.
Work b.
Power c.
Elastic modulus Pressure |
A |
||||||||
|
212) |
The e.m.f induced in a coil by a changing magnetic flux is equal
to the rate of change flux with time. Which is the unit for magnetic flux? a.
Kg m2s-2A-1 b.
Kg m2s A-1 c.
Kg m2 s-2 A Ms-2 A-1 |
A |
||||||||
|
213) |
Which of the following pairs of unit are both SI base units? a.
Ampere, degree Celsius b.
Coulomb degree Celsius c.
Ampere, kelvin Coulomb, kelvin |
C |
||||||||
|
214) |
What is the ratio of a.
10-3 b.
10-12 c.
10-9 10-15 |
D |
||||||||
|
215) |
Which of the following is least multiple? a.
Deca b.
Micro c.
Peta Deci |
B |
||||||||
|
216) |
Which physical quantity have same units in all systems of units? a.
Length b.
Time c.
Mass Power |
B |
||||||||
|
217) |
In SI number of physical quantities are a.
7 b.
2 c.
3 Infinite |
D |
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218) |
Choose the pair in decreasing order: a.
Centi, mili, micro b.
Deca, kilo, mega c.
Micro, mili, centi Kilo, mega, deca |
A |
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|
219) |
If x = at + bt2, where x is the distance in km, t is
time in sec, units of b are a.
Km/s b.
Kms-2 c.
Kms Kms2 |
B |
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|
220) |
The error in the measurement of the radius of a sphere is 1%. The
error in measurement of its volume is a.
1% b.
5% c.
3% 8%a |
C |
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|
221) |
A stop watches accurate up to 1/100 of a second, the absolute
uncertainty of the watch is a.
0.1s b.
0.01s c.
0.2s 1s |
B |
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|
222) |
Which of the following is unit less? a.
Sin 0 b.
Frequency c.
0 Both A and C |
A |
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|
223) |
The equation relating pressure and density is p = pgh. How can
both sides of this equation be written in term of base units? a.
b.
c.
|
B |
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|
224) |
The percentage error in the measurement of mass and speed are 5%
and 6% respectively. The maximum error in the measurement of momentum is a.
11% b.
30% c.
15% 90% |
A |
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225) |
The unit of percentage error is a.
Percentage error is unit less b.
Error have got their own units which are different from that of
physical quantity measured c.
Different from that of physical quantity Same as that of physical quantity |
A |
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|
226) |
The mean time period of second’s pendulum is 2.00s and mean
absolute error in the time period is 0.05s. to express maximum estimate of
error, the time period should be written as a.
(2.00 b.
(2.00 c.
(2.00 (2.00 |
C |
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|
227) |
The unit of relative permeability is a.
Henry/volt b.
Unitless c.
Henry Farad/m |
B |
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|
228) |
The SI unit of couple arm a.
Kilo meter b.
Mili meter c.
Centi meter Meter |
D |
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|
229) |
The ratio of unit of RC to the frequency is a.
Sec2 b.
Sec c.
Unitless Sec-1 |
A |
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|
230) |
Which of the following is not a correct representation method for
prefixes a.
1mm b.
1000 c.
10 km Both “A” and “B” |
B |
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|
231) |
The unit of moment of Inertia is a.
Kgm2 b.
Kgm-2 c.
Kg-1m2 Kg-2m-1 |
A |
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|
232) |
The unit of a.
Decay constant b.
Time period c.
Angular frequency Both A and B |
D |
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|
233) |
An experiment measured quantities a, and b and then x is
calculated from x = ab2, if the percentage errors in a, b, c are a.
b.
c.
|
C |
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|
234) |
Which one is a base quantity: a.
Kilogram b.
Kelving c.
Conventional current Charge |
C |
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