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The resistance of the series combination of two resistance is S. When they are joined in parallel the total resistance is P. If S = nP, then the minimum possible value of n is

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detailed solution

Correct option is A

If two resistances are R1  and R2  then


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A uniform wire of resistance 36 ohm is bent in the form of a circle as shown in fig  The effective resistance across the points A and B is


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