Q. What is the area of the plates of a $3F$ parallel plate capacitor, if the separation between the plates is $5mm$
A) $1.694 \times 10^{9}m^{2}$
B) $4.529 \times 10^{9}m^{2}$
C) $9.281 \times 10^{9}m^{2}$
D) $12.981 \times 10^{9}m^{2}$
Explanation
(a) We have $C = \frac{\varepsilon_{0}A}{d} \Rightarrow A = \frac{Cd}{\varepsilon_{0}} = \frac{3 \times 5 \times 10^{- 3}}{8.85 \times 10^{- 12}}$
$= 1.69 \times 10^{9}m^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.