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Question: Answered & Verified by Expert
A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now moved farther apart by pulling at them by means of insulating handles, then
PhysicsCapacitanceJEE Main
Options:
  • A the energy stored in the capacitor decreases
  • B the capacitance of the capacitor increases
  • C the charge on the capacitor decreases
  • D the voltage across the capacitor increases
Solution:
2706 Upvotes Verified Answer
The correct answer is: the voltage across the capacitor increases
We know that
The parallel plate capacitor $C=\frac{\varepsilon_{0} \cdot A}{d}$
When $d$ (distance between two parallel plate) increase, then $C$ will be decrease
$\because$
$Q=C V \quad$ where $Q=$ constant
$\therefore$ The voltage across the capacitor increases.

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