Chap. Measurments Tips and Tricks
→ The standard of Weight and Measures Act was passed in India in 1976. It recommended the use of SI in all fields of science, technology, trade and industry. → The dimensions of many physical quantities, especially those in heat, thermodynamics, electricity and magnetism in terms of mass, length and time alone become irrational. Therefore, SI is adopted which uses 7 basic units. Bank Of MCQs Bank Of MCQs Bank Of MCQs → The dimensions of a physical quantity are the powers to which → The dimensional formula is very helpful in writing the unit of a physical quantity in terms of the basic units. → The dimensions of a physical quantity do not depend on the system of units. → A physical quantity that does not have any unit must be dimensionless. → The pure numbers are dimensionless. → Generally, ...