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Physics (AS & A Level) · May / June 2021 · Paper 11 · Question 35

9702Practical circuits

A cell is described as having an electromotive force (e.m.f.) of 6 V. What does this mean?

  1. A1 coulomb of charge always dissipates 6 J of energy in the internal resistance of the cell.
  2. B1 electron gains 6 J of energy when passing through the cell.
  3. CThere is a potential difference of 6 V applied across any external circuit connected to the cell.
  4. DWhen 1 coulomb of charge passes through the cell, 6 J of chemical energy is transformed.

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Correct answer: D. When 1 coulomb of charge passes through the cell, 6 J of chemical energy is transformed.

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