If a bulb of 60 W is connected across a source a source of 220 V , find the current drawn by it.

Solution : Data : P=60 W, V=220 V, I=?

P=VI

∴ I=P/V=60W/220V=(3/11)A = 0.2727A

The current drawn by the bulb = 0.2727A (Approx)