Write an expression for the heat produced when an electric current is passed through it.

How is heat produced by an electric current?

Obtain an expression for the heat produced in a wire, when a current I passes through it against potental difference V.

Heat Produced By An Electric Current

(a) Write down the formula for the heat produced when a current I is passed through a resistor R for time t. (b) An electric iron of resistance 20 ohms draws a current of 5 amperes. Calculate the heat produced in 30 seconds.

LED glows even when a - electric current passes through it.