Question

In the network shown in figure, each resistance is equal to $2\Omega$. The resistance between the points $A$ and $B$ is

• A. $1\Omega$
• B. $4\Omega$
• C. $3\Omega$
• D. $2\Omega$

Answer 1

Answer: (D)

The above circuit is in Wheatstone's bridge balanced condition.
$\therefore$ No current will flow through $R^{\prime }$
$\therefore \frac{1}{R_{eq}}=\frac{1}{4}+\frac{1}{4}=\frac{2}{4}=\frac{1}{2}$
$R_{eq}=2\Omega$