Question

Calculate equivalent resistance between the points $A$ and $B$ in the given circuit.

Answer 1

The two resistances which are present in rectangle are in parallel to each other, so,

$R^{\prime }=\frac{2\times 2}{2+2}$

$R^{\prime }=1\Omega$

Now this combination is in series with the $2\Omega$

so, $R=2+1=3\Omega$