Question

What is the resistance of a light bulb that uses an average power of 60 W when

connected to a 50 Hz power source with a peak voltage of 200 V?​

Answer 1

Explanation of Solution

P′ is the average power of the 100 W light bulb. Thus, the value of the root mean square current across the power source is 0.832 A. Thus, the resistance of a 100 W light bulb is 144 Ω.