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Question 31449
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Electrostatics: Potential Energy MCQ

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Potential EnergyMediumQuestion 31449

Question

Potential energy of three charges +q each placed at corners of equilateral triangle (side L) is:
  1. A
    kq²/L
  2. B
    2kq²/L
  3. C
    3kq²/L
    Correct
  4. D
    kq²/(3L)

Correct answer

3kq²/L

Explanation

U_total = U₁₂ + U₁₃ + U₂₃ = 3×(kq×q/L) = 3kq²/L.

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