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Question

When n resistances each of value R are connected in parallel, then resultant resistance is x. When these n resistances are connected in series, total resistance is


  1. nx


Solution

The correct option is D


In parallel,

1Req = 1R1+1R2+1R3+......+1Rn

Since all resistances are equal,

1Req = nR

Req = Rn

But given this value is equal to x.

Hence x = Rn

R = nx

In series, Req = nR = n2x

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