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प्रश्न
Name the quality which is measured in Wh.
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उत्तर
Energy is measured in Wh
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?
How is work done by a force measured when the force is in the direction of displacement?
What physical quantity does the electron volt (eV) measure? How is it related to the S.I. unit of that quality?
A man spends 7.4 KJ energy in displacing a body by 74 m in the direction in which he applies force in 2.5 s. Calculate the force applied.
State the factors on which moment of force about a point depends.
State the principle of moments.
A mechanic can open a nut by applying a force of 200 N while using a lever handle of 50 cm length. How long handle is required if he wants to open it by applying a force of only 50 N?
What is the work done by the gravitational force on the moon that revolves around the earth?
What is the S.I. unit of work? Define it.
