How to Calculate Resistance of a Lamp?

Question:

The current flowing through a lamp is 1.5 A. It is plugged into a 120-V outlet. What is the resistance of the lamp?

Answer:

The resistance of the lamp is 80Ω (ohms).

To calculate the resistance of a lamp, you can use Ohm's law. Ohm's law states that the current flowing through a resistor is equal to the voltage in the resistor divided by the resistance.

The formula to calculate resistance is:

Resistance (R) = Voltage (V) / Current (I)

Given that the current flowing through the lamp is 1.5 A and it is plugged into a 120-V outlet, we can plug in these values into the formula:

R = 120V / 1.5A

R = 80Ω (ohms)

Therefore, the resistance of the lamp is 80Ω.