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Physics (AS & A Level) · May / June 2017 · Paper 13 · Question 35

9702Kirchhoff’s laws

A 20 V d.c. supply is connected to a circuit consisting of five resistors L, M, N, P and Q. [circuit diagram] There is a potential drop of 7 V across L and a further 4 V potential drop across N. What are the potential drops across M, P and Q?

  1. Apotential drop across M / V: 9; potential drop across P / V: 7; potential drop across Q / V: 13
  2. Bpotential drop across M / V: 13; potential drop across P / V: 7; potential drop across Q / V: 13
  3. Cpotential drop across M / V: 13; potential drop across P / V: 11; potential drop across Q / V: 9
  4. Dpotential drop across M / V: 17; potential drop across P / V: 3; potential drop across Q / V: 17

As printed in the paper

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Correct answer: C. potential drop across M / V: 13; potential drop across P / V: 11; potential drop across Q / V: 9

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