Question

Five resistance are combined according to the figure The equivalent resistance between the point $x$ and $y$ will be

• A. $10\Omega$
• B. $6\Omega$
• C. $30\Omega$
• D. $50\Omega$

Answer 1

The correct option is A $10\Omega$

The equivalent circuit of above can be drawn as which is a balanced Wheatstone

Ref. image

So current through $AB$ is zero.

So, $\frac{1}{R}=\frac{1}{20}+\frac{1}{20}=\frac{1}{10}$

$R=10\Omega$