Question

Find equilvalent resistance between $X$ and $\text{Y}$ :

• A. R
• B. R/2
• C. 2R
• D. 5R

Answer 1

Answer: (A)

The given circuit can be shown in the following way. No current will be flown in the middle resistance.

Equivalent resistance of $R$ and $R^{\prime }=2R$
Total resistance $\frac{1}{R^{\prime }}=\frac{1}{2R}+\frac{1}{2R}$
$R^{\prime }=R$