Q. The time constant of the given circuit is
A) $\frac{3RC}{5}$
B) $\frac{6RC}{5}$
C) $\frac{5RC}{6}$
D) None of these
Explanation
(b) Time constant of R – C circuit is $\tau = RC$
Here effective resistance of the circuit
$\ \ \ \ \ \ \ \ = \frac{2R \times 3R}{2R + 3R} = \frac{6R}{5}$
$\therefore\ \ \ \ \ \ \ \ \ \tau = \frac{6R}{5} \times C = \frac{6RC}{5}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.