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

Let us assume

Voltage of the source is V

Resistance of each bulb is R

∴ R = V2/P

Power drawn by each bulb = i2R = V2/n2R2. R

= V2/n2R

= P/n2