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Joule's law says heat is proportional to the square of the:
ACoating
BCurrent
CContact
DCoupling
Answer & Solution
Correct answer: B. Current
1. The law has three factors.
2. Resistance and time are the other two.
3. It goes with the square of the current.
_Source: NCERT Class 10 Science, Ch 12 'Electricity'_
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