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Question 31481
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Electrostatics: Electrostatics Advanced MCQ

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Electrostatics AdvancedHardQuestion 31481

Question

Force on charge q at distance d from a grounded conducting plane is:
  1. A
    kq²/(4d²) attractive
    Correct
  2. B
    kq²/d² repulsive
  3. C
    kq²/(4d²) repulsive
  4. D
    Zero

Correct answer

kq²/(4d²) attractive

Explanation

Image charge −q is at distance 2d away. F = kq²/(2d)² = kq²/(4d²), directed toward the plane (attractive).

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