Question

A 100W,200V bulb is connected to a 160V power supply.The power consumption would be?

Answer 1

$p = \frac{ {v}^{2} }{r } \\ r = \frac{ {v}^{2} }{p} \\ r = \frac{200 \times 200}{100 } \\ r = 400 \\ now \: when \: v \: = 160 \\ p = \frac{160 \times 160}{400 } \\ p = 64wt$

Answer 2

Howdy!!

your answer is ---

Given, power of bulb P = 100W

& Potential of bulb V= 200V

so , current drawn by bulb is

I = P /V

=> I = 100/200 = 0.5ampere

now, it is connected to a 160V power supply .

Then , power will be

power = current × volt

=> power = 0.5 × 160

=> power = 80W


hence, 80Watt power consumed when bulb is connected to 160V power supply



hope it help you