Question

The effective resistance between the points A and B in the figure is: -

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

Answer 1

The correct option is B $2\Omega$

The given circuit is

It can be redrawn as the resistors between the points ADC are in series.
Both $6\Omega$ resistors are parallel so the final circuit becomes,

Hence the equivalent resistance between A and B is,

$R_{\text{AB}}=\frac{3\times 6}{3+6}=2\Omega$