Question

State Joules Law of Heating.

Answer 1

When current I flow through a resistor of electric resistance R, heat is produced. The heat produced H depends directly on the square of the current, resistance and time t for which the current is allowed to pass.

Heat is directly proportional to the:
(i) square of current flowing in a circuit
(ii) resistance in the circuit
(iii) time in which the current flows in the circuit

H=I²Rt,
Is called Joule’s law of heating.

SI unit Heat energy: joule

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