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Question 31445
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Electrostatics: Potential Energy MCQ

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Potential EnergyMediumQuestion 31445

Question

Potential energy of two point charges q₁ and q₂ at distance r is:
  1. A
    kq₁q₂/r²
  2. B
    kq₁q₂/r
    Correct
  3. C
    kq₁q₂r
  4. D
    k(q₁+q₂)/r

Correct answer

kq₁q₂/r

Explanation

U = kq₁q₂/r. This is the work done to assemble the pair from infinity. Positive for like charges (repulsion stores energy).

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