Question

an electric bulb is rated 50 W ,200 V if it is operated at 110 V , then power consumed by it is ​

Answer 1

Answer:

as, P = V^2/R

Here, P = 50 W

V = 200 V

Now, R = V^2/P

or,. R = 200×200/50 = 800 ohm

Now, power consumed ,P= 110×110/800

or, P = 121/8 = 15.125 W