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Physics (AS & A Level) · May / June 2016 · Paper 13 · Question 35

9702Kirchhoff’s laws

A circuit contains a cell, two resistors of resistances $R_1$ and $R_2$ and a variable resistor X. The cell has negligible internal resistance. $V_1$ is the potential difference across the resistor of resistance $R_1$. $I_2$ is the current through the resistor of resistance $R_2$. The resistance of X is reduced. What is the effect on $V_1$ and $I_2$?

  1. Adecreases / decreases
  2. Bdecreases / increases
  3. Cincreases / decreases
  4. Dincreases / increases

As printed in the paper

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Correct answer: C. increases / decreases

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