Q4 of 50 Page 379

State Joules low of heating and give its expression.

According to Joule’s law of heating the heat produced in the resistor is

1. Directly proportional to the square of the current through the resistor


2. Directly proportional to the resistance of the given resistor


3. Directly proportional to the time for which the current flows.


Mathematically, Joule’s law of heating is given by



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