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Physics (AS & A Level) · Oct / Nov 2023 · Paper 11 · Question 36

9702Practical circuits

A circuit contains a cell of electromotive force E and internal resistance r connected to a resistor of resistance R. The current in the circuit is I. Which equation is correct?

  1. AE – Ir = IR
  2. BE = Ir – IR
  3. CE + Ir = IR
  4. DE = IR

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Correct answer: A. E – Ir = IR

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