Q.21) Name the physical quantity which is measured in calorie. How is it related to the SI unit of that quantity?
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Q.22) Define kilowatt hour. How is it related to joule?
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Q.23) Define the term power. State its SI unit.
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Q.24) State two factors on which power spent by a source depends. Explain your answer with example.
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Q.25) Differentiate between work and power.
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