Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

The diagram illustrates a circuit made up of a thermistor, a fixed resistor and a battery. The graph gives the $I$-$V$ characteristics for both components. The battery has an e.m.f. of $12\,\text{V}$ and negligible internal resistance. What current flows through the fixed resistor?

  • A$0.36\,\text{mA}$
  • B$0.40\,\text{mA}$
  • C$0.48\,\text{mA}$
  • D$0.80\,\text{mA}$

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