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Q.

Five equal resistances each of value R are connected in as shown in figure. The equivalent resistance of the network:

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a

Between the points B and D is R

b

Between the points A and C is R/2

c

Between the points B and Dis 2R 

d

Between the points A and C is R

answer is C.

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Detailed Solution

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1RBD=12R+1R+12R⇒RBD=R2

Between A and C circuit becomes equivalent to balanced Wheatstone bridge so RAC = R.

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