Question

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

• A. Constant, decreases, decreases
• B. Increase, decreases, decreases
• C. Constant, decreases, increases
• D. Constant, increases, decreases

Answer 1

Answer: (C)

Constant, decreases, increases

Answer 2

After charging, isolated

So Q = constant

Q d increasing ̃ C¯

Q V µ$\frac { 1 } { \mathrm { C } }$ ̃ V increasing