What is the equivalent resistance between A and B in the given circuit, if $R = 3 Ω$ .

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Solution

The correct option is A 8
Effective resistance of the resistance between C and D = $\frac{R \times 2 R}{R + 2 R} = \frac{2}{3} R$
Total resistance between A and B = $R + \frac{2}{3} R + R$
$= \frac{8}{3} R = \frac{8}{3} \times 3 = 8 Ω$

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