Q. g cm s 2 stands for the unit of EnergyForceMomentumAcceleration Answer: Force
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Q. A vernier caliper has its main scale of 10 cm equally divided into 200 equal parts. If vernier scale of 25 divisions coincides with 12 mm on the main scale. The least count of the instrument is 0.020 cm0.002 cm0.010 cm0.01 cm Answer: 0.002 cm
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Q. Which of the following quantities is expressed as force per unit area? WorkAreaVolumePressure Answer: Pressure
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Q. Electron volt is a unit of Potential differenceElectric currentElectronic chargeEnergy Answer: Energy
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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
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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
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Q. One kilometer is equal to how many miles? 0.840.51.60.62 Answer: 0.62
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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
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Q. The dimensions of Kinetic energy is same as that of ForcePressureWorkMomentum Answer: Work
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Q. Light year is a unit of timedistancesunlight intensitymass Answer: Distance
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