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Physics (AS & A Level) · Feb / March 2024 · Paper 12 · Question 32

9702Practical circuits

What are the definitions of potential difference (p.d.) and electromotive force (e.m.f.), in terms of energy transfer W and charge q?

  1. Ap.d. = W/q, e.m.f. = W/q
  2. Bp.d. = W/q, e.m.f. = Wq
  3. Cp.d. = Wq, e.m.f. = W/q
  4. Dp.d. = Wq, e.m.f. = Wq

As printed in the paper

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Correct answer: A. p.d. = W/q, e.m.f. = W/q

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