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October 31, 2014

Homework Help: science

Posted by Megan on Wednesday, March 7, 2007 at 7:21pm.

what happens to the power of an electric circuit if the resistance is decreased?? explain?? i know that as the power increases the resistance decreases why is that??

Power = voltage^2 / resistance.

Think again about what you "know". Resistance does not decrease with increased power. For some things, like incandescent light bulbs, it goes up. Usually it stays the same.

P = I*V = V^2/R

Assume the circuit voltage (V) stays the same. What happens to power (P) when R decreases?

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