How to Calculate Resistance of a Lamp in a Parallel Circuit?

10 Dec 2023

What is the resistance of one lamp if three identical lamps are connected in parallel with a combined resistance of 150 ohms?

The resistance of one lamp in this scenario is 50 ohms.

When three identical lamps are connected in parallel, the combined resistance can be calculated using the formula:

1/Rt = 1/R + 1/R + 1/R

Given that the equivalent resistance (Rt) is 150 ohms, we can substitute the values and solve for the resistance of one lamp (R).

By simplifying the equation, we get:

1/150 = 1/R + 1/R + 1/R

1/150 = 3/R

R = 50 ohms

Therefore, the resistance of one lamp in this parallel circuit setup is 50 ohms.