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Heat And Power Developed In A Resistor - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main

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Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is :
 

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Heat and power developed in a resistor
  1. Heat and Power developed in a resistor

Heat developed in a resistor: When a steady current flows through a resistance R for time t, the loss in electric potential energy appears as increased thermal energy(Heat H) of resistor and H=i^2Rt

The power developed = \frac{energy}{time}=i^2R=iR=\frac{V^2}{R}      (from Ohm's law)

Unit of heat is the joule (J)

Unit of power is watt (W)

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Heat and power developed in a resistor

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