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Q.

Each of the resistors shown in figure has resistance R. Find the equivalent resistance between A and B.

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a

$\frac{7 R}{4}$

b

$\frac{5 R}{4}$

c

$\frac{9 R}{4}$

d

$\frac{11 R}{4}$

answer is D.

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Detailed Solution

The figure can be redrawn as follows:

Question Image

$R_{A B} = R + \frac{3 R}{4} + R = \frac{11 R}{4}$

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