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प्रश्न
Name the quality which is measured in kWh.
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उत्तर
Energy is measured in kWh
संबंधित प्रश्न
A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions
1) Is the stone moving with a uniform or variable speed?
2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?
3) What kind of force acts on the hand and state its direction?
What physical quantity does the electron volt (eV) measure? How is it related to the S.I. unit of that quality?
Differentiate between work and power.
An ox can apply a maximum force of 1000 N. It is taking part in a cart race and is able to pull the cart at a constant speed of 30 ms-1 while making its best effort. Calculate the power developed by the ox.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
State the condition when the work done by a force is negative. Explain with the help of examples.
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What is the S.I. unit of work? Define it.
Derive a relation between the S.I. and C.G.S. unit of force.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
