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?

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/r..giving inverse relation with r.

hope this helps.

Thanking you

Team

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