Question

State joules law of heating. List two special characteristics of a heating element wire.

Answer 1

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Joules law of heating:

According to Joules law of heating, we came to know that the amount of heat produced in a electrical wire due to electrical flow ,is directly proportional to the time of the electrical flow when the resistance of that wire and the amount of electricity flow are constant.

Special characteristics of heating element wire:

1)the resistances of these kind of wires are very high

2)the melting points of these kind of wires are also very high

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Answer 2

Answer:

when current I flow Through a resistor of resistance R heat is produce.the heat produced h depends directly on the square of the current,resistance and time t for which the current allowed to pass H=12Rt is called joules law of heating.