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CBSE - XII Science - Physics - Current Electricity

Power = current square into resistance hence p is directly proportional to r also Power =voltage square upon resistance so p is inversely proportional to r but how power can be both directly and inversely proportional to resistance?

Asked by DIPTI PRIYA 29th January 2011, 1:46 PM
Answered by Expert


Dear student,
we dont apply the two formulas simultaneously ...when current is constant we apply p=i^2r ..hence directly proportional..and when potential constant..we apply p=v^2/ inverse relation with r.
hope this helps.
Thanking you
Answered by Expert 29th January 2011, 3:24 PM

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