Q. Electron volt is a unit of Potential differenceElectric currentElectronic chargeEnergy Answer: Energy

Q. Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s-1 ± 0.5 ms-1 B = 0.10 s ± 0.01 s The value of A B will be (0.25 ± 0.08) m(0.25 ± 0.5) m(0.25 ± 0.05) m(0.25 ± 0.135) m Answer: (0.25 ± 0.08) m

Q. The mass and volume of a body are 4.237 g and 2.5 cm3, respectively. The density of the material of the body in correct significant figures is 1.6048 g cm-31.69 g cm-31.7 g cm-31.695 g cm-3 Answer: 1.7 g cm-3

Q. One kilometer is equal to how many miles? 0.840.51.60.62 Answer: 0.62

Q. There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is 0.05 cm0.5 cm5.0 cm0.005 cm Answer: 0.005 cm

Q. The dimensions of Kinetic energy is same as that of ForcePressureWorkMomentum Answer: Work

Q. Light year is a unit of timedistancesunlight intensitymass Answer: Distance