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One watt hour is the energy used when one watt runs for:
AOne moment
BOne month
COne hour
DOne minute
Answer & Solution
Correct answer: C. One hour
1. Energy is power multiplied by time.
2. The unit's name gives it away.
3. It is one hour.
_Source: NCERT Class 10 Science, Ch 12 'Electricity'_
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