Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

A cell that has internal resistance is joined to a variable resistor $R$ as shown. The resistance of $R$ is then reduced step by step. What happens to the current $I$ and to the terminal potential difference (p.d.) across the cell?

  • Acurrent $I$ decreases; terminal p.d. decreases
  • Bcurrent $I$ decreases; terminal p.d. increases
  • Ccurrent $I$ increases; terminal p.d. decreases
  • Dcurrent $I$ increases; terminal p.d. increases

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