Q. The value of 0.98 – 0.989 with regard to the significant digit will be: 0.001 0.010 × 10-1 0.01 × 10-1 None of these Answer: 0.01 × 10-1
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Q. What is the number of significant figures in (3.20 + 4.80) × 105? 2 3 4 5 Answer: 3
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Q. The least count of a stop watch is 0.1s. The time of 20 oscillations of the pendulum is found to be 20s. The percentage error in the time period is 0.25% 0.75% 0.50% 1.0% Answer: 0.50%
Q. Which of the following is a dimensionless quantity, even when the measured quantity is not dimensionless? absolute error Gross error Relative error experimental error Answer: Relative error
Q. Which of the following have the same dimensions as Plank’s constant? Moment of momentum Moment of fierce Momentum/distance Force/distance Answer: Moment of momentum
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Q. The zero error belongs to the category of: constant error personal error accidental error instrumental error Answer: instrumental error
Q. Which of the following have the same dimensions as v2r Where v is the speed of the particle describing a circular path of radius r. Force Impulse Acceleration Momentum Answer: Acceleration
Q. If the unit of force and length are doubled, the unit of energy will be 1/2 times 2 times 4 times 1/4 times Answer: 4 times
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Q. The density of a liquid is 13.6 g cm-3. Its value ip S.I. is 13.6 kgm-3 136 kgm-3 13600 kgm-3 1360 kgm-3 Answer: 13.6 kgm-3
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Q. Which of the following is not the name of physical quantity? Kilogram Density Impulse Energy Answer: Kilogram
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