Question

A 40 watt bulb is connected to a source of 220v .find the current fllowing in it

Answer 1

power = P = 40 W

potential difference = V = 220 v

current = I = ?

we know that P = V×I

P = V × I

P/V = I

40/220 = I

0.18 A = I

so 0.18 ampere current flowing through 40 Watt bulb from 220 v source