Question

22.A current of0.4 flows through an electric bulb working at 230V what is the power of the bulb​

Answer 1

Power =VI
Power = 0.4x 230
Power= 92 watt

Answer 2

First we need to find resistance, i.e.

V/I = 230/0.4

= 575 ohm

Using the formula I²R

P= (0.4)²*575

=0.16*575

= 92 watt