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Question 31597
JEE Physics · Hard

Capacitance: Capacitor in Gravity MCQ

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Capacitor in GravityHardQuestion 31597

Question

A horizontal capacitor is charged and disconnected. One plate is released and falls freely. Capacitance of the system:
  1. A
    Increases
  2. B
    Decreases
    Correct
  3. C
    Stays same
  4. D
    Becomes zero

Correct answer

Decreases

Explanation

As the plate falls, separation d increases. C = ε₀A/d decreases. Q is fixed (disconnected), so voltage V = Q/C increases as the plate falls.

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