Question

Write a mathematical expression for Joule's law of heating. Nme one device which works on this principle?

Answer 1

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H=(IR)It

H=I2Rt

that is known as Joule's heating effect

Answer 2

H = I2Rt= VIt= V2t/R
Joule’s Law of Heating
The heat which is produced due to the flow of current within an electric wire, is expressed in unit of Joules.
Many devices like thermocouple, Iron, Heater.

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