A 40-w lightbulb connected to a 120-v source experiences a voltage surge that produces 132 v for a moment. by what percentage do

Question

3 years ago

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A 40-w lightbulb connected to a 120-v source experiences a voltage surge that produces 132 v for a moment. by what percentage do

es its power output increase? assume its resistance does not change.a 40-w lightbulb connected to a 120-v source experiences a voltage surge that produces 132 v for a moment. by what percentage does its power output increase? assume its resistance does not change.

Physics

1 answer:

andrey2020 [161] · Answer 1 · 2022-08-19T17:40:34+03:00

andrey2020 [161]3 years ago

3 0

R=U^2/P=120*120/40=360 ohm
P2=U2^2/R=132*132/360=48.4 w
power increase ratio (48.4-40)/40=21%