Question

Equivalent resistance between $A$ and $B$ is $-$
(each connecting arm has resistance ${}^{\prime }{r}^{\prime }$ )

• A. $\frac{7r}{15}$
• B. $\frac{8r}{15}$
• C. $\frac{3r}{5}$
• D. $\frac{16r}{5}$

Answer 1

Answer: (B)

$R_{AB}=\frac{8R}{15}$