Q. A capacitor of 10 $\mu$F has a potential difference of 40 V across it. If it is discharged in 0.2 s, the average current during discharge is
A) 2 mA
B) 4 mA
C) 1 mA
D) 0.5 mA
Explanation
(a) Current $i = \frac{q}{t} = \frac{CV}{t} = \frac{(10 \times 10^{- 6}) \times 40}{0.2}$
$= 2 \times 10^{- 3}A = 2\ mA$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.