The current – potential difference graph for one type of electrical component is drawn below.

(a) What is the component?

(1 mark)

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(b) Complete the diagram to show a circuit that can be used to obtain the data needed to plot the graph. Use the correct circuit symbol for each component that you add to the diagram.

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(2 marks)

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(c) (i) What is the current through the component when the potential difference across the component is 0.8 volts?

Current = ..................................... amps
(1 mark)

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(c) (ii) Using an appropriate equation, calculate the resistance of the component when the potential difference across it is 0.8 volts.

Show clearly how you work out your answer.

Resistance = ............................... ohms
(2 marks)

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From Q5 P2 AQA January 2011 (Higher)