Which of the followings are true about Joule’s Law of Heating?

Heat is directly proportional to the square of the current.

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Heat is directly proportional to resistance.

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Heat is directly proportional to time.

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Heat is inversely proportional to resistance.

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Solution

The correct options are
A Heat is directly proportional to the square of the current.
B Heat is directly proportional to resistance.
C Heat is directly proportional to time.
The heat produced in a resistor is directly proportional to the square of current, resistance and the time for which the current flows through the resistor.

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