Joule’s law of Heating:
When a current of I amperes passes through a circuit of resistance R ohms for a time of t seconds then the heat produced is given by the relation.
The above relation is known as the joule’s law of heating. It states that the heat produced is proportional to
- Square of the current I.
- Resistance of the circuit R.
- The time t during which the current flows through the circuit.
Heat produced in calories can be expressed as
H=I2Rt/4.18 calories (1 calorie=4.18 joule)