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Physics (AS & A Level) · May / June 2016 · Paper 11 · Question 36

9702Kirchhoff’s laws

Two resistors of resistances R1 and R2 are connected in parallel. What is the combined resistance between X and Y?

  1. AR1 + R2
  2. B\frac{R_1 R_2}{R_1 + R_2}
  3. C\frac{R_1 + R_2}{R_1 R_2}
  4. D\frac{R_1}{R_2}

As printed in the paper

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Correct answer: B. \frac{R_1 R_2}{R_1 + R_2}

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