GCSE Standard Questions: Electric Circuits

Q3. (a) The circuit diagram shows a lamp and an 18 Ω resistor connected in a series circuit.

(i) Calculate the potential difference across the 18 Ω resistor. Give the answer to two significant figures.

[4 marks]

(ii) Calculate the potential difference across the lamp.

[1 mark]

(b) The sketch graphs show the current-potential difference graphs for three electrical components, A, B and C.

(i) Which component, A, B or C is a lamp?

[1 mark]

(ii) Which component, A, B or C is a diode?

[1 mark]

(Total 7 marks)