Physics, asked by akshayadevan06, 5 months ago

a filament lamp designed to work at a potential difference 250v has power 100w. what will be the power of this lamp when connected to a 100v supply

Answers

Answered by anamikasudheer2006

1

Answer :

16 W

Explanation :

V = 250v

P = 100w

P = V²/ R,

R = V²/P

R = 250 x 250 / 100

= 625 ohm

V = 100v

R = 625 ohm

P = V² / R

= 100 x 100 / 625

= 16 w

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