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Question 31443
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Electrostatics: Potential Difference MCQ

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Potential DifferenceEasyQuestion 31443

Question

Potential difference between points A and B is V_A − V_B. Work done to move charge q from A to B is:
  1. A
    q(V_A − V_B)
    Correct
  2. B
    q(V_B − V_A)
  3. C
    q/V_A
  4. D
    V_A/q

Correct answer

q(V_A − V_B)

Explanation

W_AB = q(V_A − V_B). Positive when moving from high V to low V (charge naturally flows this way).

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