Which of the following is not the unit of energy?
Q. Which of the following is not the unit of energy? watt-hour electron-volt N × m kg × m/sec Answer: kg × m/sec
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In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a-degree (= 0.5°), then the least count of the instrument is
Q. In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a-degree (= 0.5°), then the least count of the instrument is One minute Half minute One
What is the number of significant figures in 0.310×10 ?
Q. What is the number of significant figures in 0.310×10 ? 6 2 4 3 Answer: 3
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In case of measurement of ‘g’, if error in measurement of length of pendulum is 2%, the percentage error in time period is1 %. The maximum error in measurement of g is
Q. In case of measurement of ‘g’, if error in measurement of length of pendulum is 2%, the percentage error in time period is1 %. The maximum error in measurement of g is 1 % 2 % 4 % No error Answer: 4 %
The number of significant figures in the distance of one light year, 9.4605 × 10 m is
Q. The number of significant figures in the distance of one light year, 9.4605 × 10 m is thirty five four three Answer: five
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Dimensions cannot be used to
Q. Dimensions cannot be used to check dimensional correctness of a formula convert units find value of the constant of proportionality in an equation deduce a relation among physical quantities Answer: find value of the constant of proportionality in an equation
Out of the following pairs, which one does not have identical dimensions ?
Q. Out of the following pairs, which one does not have identical dimensions ? Angular momentum and Planck’s constant Impulse and momentum Moment of inertia and moment of a force Work and torque Answer: Moment of inertia and moment of a force
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A student measures the distance covered and time taken by a body under free fall which was intially at rest. He uses this data for estimating g, the acceleration due to gravity. If the maximum percentage error in measurement of the distance and the time are e1 and e2 respectively, then the maximum possible percentage error in the estimation of g is
Q. A student measures the distance covered and time taken by a body under free fall which was intially at rest. He uses this data for estimating g, the acceleration due to gravity. If the maximum percentage error in measurement of the distance and the time are e1 and e2 respectively, then the maximum possible
Identify the pair whose dimensions are equal
Q. Identify the pair whose dimensions are equal. Torque and work Stress and energy Force and stress Force and work Answer: Torque and work
In the above question dimensions of b/c are the same as those of
Q. In the above question dimensions of b/c are the same as those of Wave velocity Wavelength Wave amplitude Wave frequency Answer: Wave velocity
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