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Physics (AS & A Level) · May / June 2026 · Paper 14 · Question 32

9702Potential difference and power

Power P is supplied to a component of resistance R in an electrical circuit. When charge Q passes through the component, the energy transferred to the component is E. Which equation defines the potential difference (p.d.) V across the component?

  1. AV = EQ
  2. BV = E/Q
  3. CV = PR
  4. DV = √(PR)

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Correct answer: B. V = E/Q

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