1.

(a) Which circuit has the highest current?

(b) The resistance of the bulb is 20Ω.

(i) What is the current in circuit B?

(ii) What is the potential difference across the bulb in each circuit?

2.

This graph shows the IV characteristics of an electrical component.

(a) What could this component be?

(b) Calculate the resistance of this component.

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5. Name components A to D and sketch graphs to show their IV characteristics.

6. Some students plot the resistance of a thermistor at various temperatures.

(a) Describe the effect of temperature on resistance for this component.(b) Add a line of best fit to the graph.

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