an electric bulb is related220 V and 100 W when it is operated on 110 V the power consumed will be


Asked by kartik2811somvanshi | 22nd Jun, 2021, 08:44: AM

Expert Answer:

Resistance R and Power P are related as
P = V2 / R 
where V is voltage
Hence Power is directly proportional to square of voltage but resistance will remain constant.
Hence when voltage is halved , power is reduced by a factor (1/4)
Hence power consumed by the bulb at 110 V is (100/4) = 25 W

Answered by Thiyagarajan K | 22nd Jun, 2021, 09:26: AM