Q. 43.5( 10 Votes )

Write a mathematical expression for Joule’s law of heating effect of current. Name one device which works on this principle.

Answer :

We know that H = VIT

And V = IR by Ohm’s law

H = (IR)IT

H = I2RT

This is the Mathematical form of the Joule’s law of heating effect.

Iron and heater are the devices that use the Joule’s law of heating effect.

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