Question

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

• A. $2\Omega$
• B. $3\Omega$
• C. $4\Omega$
• D. $5\Omega$

Answer 1

The correct option is D $5\Omega$


$6\Omega$ and $3\Omega$ resistors are in parallel.

So, their equivalent resistance $=\frac{6\times 3}{6+3}=2\Omega$

Also, all the $3\Omega$ resistors are in parallel.

So, their equivalent resistance $=\frac{3}{3}=1\Omega$

The equivalent circuit is shown in the figure.


Now,

$R_{AB}=2+2+1=5\Omega$