Question

Find the resistance between the points $A$ and $B$ .

• A. $\frac{R}{2}$
• B. $R$
• C. $2R$
• D. $3R$

Answer 1

The correct option is C $2R$


The above circuit can be simplified as :

Therefore, the net resistance between points $A$ and $B$ is :
$R_{AB}=R+\frac{1}{\frac{1}{3R}+\frac{1}{3R}+\frac{1}{3R}}$

$\Rightarrow R_{AB}=R+R=2R$