An electric bulb is connected to a 220V power supply line, if the bulb draws a current of 0.5A, calculate the power of the bulb.

 Electric power is the rate at which work is done or energy is transformed into an electrical circuit. Simply put, it is a measure of how much energy is used in a span of time.

Formula

The formula for electric power is given by

P = VI
where,

P is the power

V is the potential difference in the circuit

I is the electric current

Power can also be expressed as

P = I2R
P = V2/ R
The above two expressions are got by using Ohm’s law, Where, Voltage, current, and resistance are related by the following relation

V = IR
Where,
R is the resistance in the circuit.
V is the potential difference in the circuit
I is the electric current

Solution

Given

V = 220V

I = 0.5A

Find out

We have to determine the power of the bulb

P =?

Solution

P = VI

P= 220 x 0.5 A

P = 110 watt

Answer

The power of the bulb is 110 watt