Q. Find the equivalent resistance between the points $a$ and $b$
A) $2\ \Omega$
B) $4\ \Omega$
C) $8\ \Omega$
D) $16\ \Omega$
Explanation
(b) Given circuit is a balanced Wheatstone bridge circuit, hence it can be redrawn as follows
$R_{AB} = \frac{12 \times 6}{(12 + 6)} = 4\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.