Joule’s law of heating effect|physical science class 10

Joule’s law of the heating effect of the current state that the amount of heat produced in a resistor is,

(i) directly proportional to the square of the current (H ∝ I2)

(ii) directly proportional to the resistance of the resistor (H ∝ R)

(iii) directly proportional to the time for which the current flows through the resistor (H  ∝ t)

combining all three we get,

H ∝ I2Rt

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