The capacitance of capacitor increases when :
(A) its charge increases
(B) its supply voltage decreases
(C) common area of the plates increases
(D) separation between the plates decreases
Choose the correct answer
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (C) and (D)
Capacitance, $C=\frac{ε_0ε_rA}{D}$
where,
A = Area of overlap plates
D = Distance between the plates
(C) If common area of plate increases, A increases and thus C increases.
(D) If the seperation between the plate decreases, D decreases and thus A increases.