Q. The effective resistance between points $A$ and $B$ is
A) $10\ \Omega$
B) $20\ \Omega$
C) $40\ \Omega$
D) None of the above three values
Explanation
(a) This is a balanced Wheatstone bridge. Therefore no current will flow from the diagonal resistance $10\Omega$
$\therefore$ Equivalent resistance $= \frac{(10 + 10) \times (10 + 10)}{(10 + 10) + (10 + 10)} = 10\Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.