Answer to Question #318917 in Electric Circuits for Ovire lino

Question

When Asinusoidal current of maximum value of 20mA flows through aresistor ,the p.d across its ends is 400V maximum .find the energy dissipated by resistor in a time of 5minutes

Answer 1

The energy dissipated by resistor

$$W=\frac{I_{\max}V_{\max}}{2}t$$

$$W=\frac{0.02\:\rm A\times 400\: V}{2}\times (5\times 60\: \rm s)=1200\: J$$