Asked by Anonymous

A 100-watt lamp glows brighter than a 25-watt lamp. What do you know about the resistances of these two lamps?

12 years ago

Answered by NEETHU

Power,P= I^2R
Since power is directly proportional to resistance R, the bulb with greater power will have greater resistance.

12 years ago

Answered by Elena

P₁₀₀>P₂₅ =>
U²/R₁₀₀ > U²/R₂₅.
Since U = const =>
R₂₅>R₁₀₀

12 years ago

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