Chapter 10 Work and Energy Questions-04
Questions
1. What is power?
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Answer
Power is defined as the rate of doing work or the rate of transfer of energy. If an agent does a work W in time t, then power is given by:
It is expressed in watt (W).
2. Define 1 watt of power.
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Answer
A body is claimed to possess power of one watt if it works at the speed of 1 joule in
That is,
One
3. A lamp consumes
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Answer
Power
Time
Work done
Power
Hence, the power of the lamp is
4. Define average power.
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Answer
Average power is defined as the ratio of total work done by the body to the total time taken by the body.
