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प्रश्न
kWh is the unit of ______.
विकल्प
Power
Force
Energy
None of these
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उत्तर
kWh is the unit of energy.
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संबंधित प्रश्न
State two factors on which power spent by a source depends. Explain your answer with examples.
Name the quality which is measured in kW.
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 a centripetal force?
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
An engine does 54,000 J of work by exerting a force of 6000 N on it. What is the displacement in the direction of the force?
A man raises a box of mass 50 kg to a height of 2 m in 20s, while another man raises the same box to the same height in 50s. Calculated:
- the work done, and
- the power developed by each man. Take g = 10 N kg-1.
State the condition when the work done by the force is positive
State the practical unit mainly used in mechanical engineering and write down its equivalent in watt.
