An electric bulb is connected to a 220 V power supply line. If the bulb draws a current of 0.5 A, calculate the power of the bulb.
Current = I = 0.5 A
Potential difference = V = 220 V
Power = P = ?
Now, P = V I
Put the values
P = 220 * 0.5
P = 110 watt.
Therefore, the power of the bulb is 110 watt.