Question

A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential and capacitance respectively are

• A. constant, decreases, decreases
• B. increases, decreases, decreases
• C. constant, decreases, increases
• D. constant, increases, decreases

Answer 1

Answer: (D)

constant, increases, decreases

Answer 2

After separation charge is constant.
Capacity, $C=\frac{\varepsilon_{0}A}{d}$
Capacitance decreases with increase in distance and $V=\frac{Q}{C}$
Potential increases with decrease in capacitance (C).