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. 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.

Question

21 November, 18:50

+2

Answers (1)

Know the Answer?

Li · Answer 1

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%