Physics, asked by praseethashaji02, 2 months ago

100 W bulb work on 230 V supply.
a) if voltage is halved, how much will be the power

Answers

Answered by manoranjanphy1

4

Explanation:

power = V²/R

= ( 230 x 230)/R

R = (230 x 230)/ 100 = (23x 23 ) ohm

power =( 115 x 115)/ ( 23 x 23)

= 25 W

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