Q. In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is FA2T FAT2 FA2T FAT Answer: FAT2

Q. Physical quantities are quantities such as degrees, radians and steradians quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity quantities such as pounds, dollars and rupees quantities such as kilos, pounds and gallons Answer: quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance,

Q. The dimensions of kinetic energy is [M 2L2T] [ML 2T] [ML 2T-2] [ML 2T-1] Answer: [ML 2T-2]

Q. The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is 164 ± 3 cm2 163.62 ± 2.6 cm2 163.6 ± 2.6 cm2 163.62 ± 3 cm2 Answer: 164 ± 3 cm2

Q. Which of the following pairs has the same dimensions? Specific Heat and Latent Heat Impulse and Momentum Surface Tension and Force Moment of Inertia and Torque Answer: Impulse and Momentum

Q. The equation of state of some gases can be expressed as Vander wal equation i.e. (P +a/v2)(V – b) = RT Where P is the pressure, V is the volume, T is the absolute temperature and a, b, R are constants. The dimensions of ‘a’ are: [M1L1T-1] [M1L-5T1] [M2L5T-1] [M1L5T-2] Answer: [M1L5T-2]

Q. Which of the following pairs of physical quantities does not have same dimensional formula? Work and torque. Angular momentum and Planck’s constant Tension and surface tension Impulse and linear momentum Answer: Tension and surface tension

Q. The mean length of an object is 5 cm. Which of the following measurements is most accurate? 4.9 cm 4.805 cm 5.25 cm 5.4 cm Answer: 4.9 cm

Q. The number of significant figures in 600 m is 1 2 3 4 Answer: 3