# Ohm's Law: Calculating Resistance of a Lamp

## What is the resistance of a lamp that uses 100.0 watts of power with a voltage of 210.0 volts?

Resistance = Voltage/Current

## Answer:

The resistance of the lamp is 441 ohms.

It is given that the power of the lamp, P = 100 watts and the voltage, V = 210 volts. The power of an electrical appliance can be represented as:

**P = V^2 / R**

Therefore, the formula for resistance is:

**R = V^2 / P**

Substitute the values of voltage and power into the formula:

R = (210 V)^2 / 100 W

After calculation, we find that the resistance of the lamp is 441 ohms.

Thus, the required solution is that the resistance of the lamp is 441 ohms based on the given power and voltage values.