Electric wire of resistance 20 ohm takes a current of 5 ampere calculate the heat developed in 30 seconds
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According to Joule's law of heating ;
H = I²RT
Where H is the amount of heat, I is the electric current flowing through a conductor, R is the amount of electric resistance present in the conductor, and t is the amount of time taken.
H = 5²×20×30 = 25×600 = 15 KJ
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