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Q.

A thin uniform wire of resistance R is bent in the form of a regular polygon of n sides( n3). The equivalent resistance between two adjacent vertices of the polygon is 

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a

Rn2-1n

b

Rnn-1

c

Rn2n-1

d

Rn-1n2

answer is A.

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Detailed Solution

reistance of each arm is Rn n-1 arms are in series and one is parallel with them Rnn-1 iin parallel with Rn {Rn-1nxRn}/R=Rn-1n2

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