Energy consumed in electric circuit

“Energy consumed in electric circuit”:

The energy consumed in an electric circuit is equal to work done by electric source to flow the current in the circuit.

By the definition of potential difference:

Potential difference=(work done)/charge

V = W/Q

W = V×Q

By ohm's law: V = R×I

And  Q = I×t

Hence, W = (R×I)(I×t)

W = I²Rt

This work done is the amount of energy consumed in electric circuit this energy is obtained in the form of heat.

Thus, Heat = I²Rt

This is also known as “joules law of heat production”.