Question

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Answer 1

Answer:

Joule's law is a mathematical description of the rate at which resistance in a circuit converts electric energy into heat energy. The heat that is generated because of the current flow in an electric wire is described in Joules

Answer 2

Answer:

Joule's law of heating states that heat produced in joule's when a current of I amphere flows in a wire of resistance R ohms for time t seconds is given by

H=I²Rt

Thus heat produced in a wire is directly proportional to:-

➡square of current

➡Resistance of wire

➡Time for which current is passed

Expression for joule's law of heating:-

V=W/Q

WE ALREADY KNOW THAT

V=IR, Q=IT =>I=Q/T

LET US TAKE W=V×Q

W=IR×IT

W=I²TR

WE KNOW THAT H=I²RT

THEREFORE W=H