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.