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.
H=I^{2}Rt
joules
The above
relation is known as the joule’s law of heating. It states
that the heat produced is proportional to
1.
Square of
the current I.
2.
Resistance
of the circuit R.
3.
The time t
during which the current flows through the circuit.
Heat
produced in calories can be expressed as
H=I^{2}Rt/4.18
calories (1 calorie=4.18 joule)
