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Physics (AS & A Level) · May / June 2019 · Paper 11 · Question 33

9702Potential difference and power

A voltmeter connected between two points P and Q in an electrical circuit shows a reading of 1 V. Which statement is correct?

  1. AThe energy needed to move +1 C of charge from P to Q is 1 J.
  2. BThe energy needed to move +1 C of charge from Q to P is 1 J.
  3. CThe energy needed to move one electron from P to Q is 1 J.
  4. DThe energy needed to move one electron from Q to P is 1 J.

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Correct answer: B. The energy needed to move +1 C of charge from Q to P is 1 J.

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