# How to Calculate Resistance of a Lamp

## How can we calculate the resistance of a lamp?

Enter any two known values and press "Calculate" to solve for the others.

## Calculating the Resistance of a Lamp

To calculate the resistance of a lamp, you need to know at least two of the following values: watts, voltage, current, and resistance. You can use Ohm's Law, which states that resistance (R) equals voltage (V) divided by current (I), or R = V/I.

For example, if you have a 100 watt light bulb operating on 120 volts AC, you can find the resistance by dividing the voltage by the current. Enter 100 in the Watts field and 120 in the Voltage field, then press Calculate to find the resistance and current.

Using Ohm's Law, you can also calculate the resistance by knowing the current. Simply divide the voltage by the current to find the resistance.

Remember that resistance is measured in ohms (Ω) and is a crucial factor in determining the electrical properties of a lamp. By calculating the resistance, you can better understand the power consumption and efficiency of the lamp.