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GCSE Standard Questions: Electric Circuits

Q1. (a) Draw a diagram to show how three 1.5 V cells should be connected together to give a potential difference of 4.5 V.

[2 marks]

 

(b) A student built the circuit shown in the diagram below:

(i) Calculate the resistance of the complete circuit

(3 marks)

(ii) Calculate the resistance of resistor Q

(1 mark)

(c) The student rebuilds the circuit above, this time putting the two resistors in parallel instead of series.

(i) What happens to the total resistance of the circuit?

Tick one box.

It increases  
It decreases  
It stays the same  

(1 mark)

(ii) Explain your answer.

(1 mark)

(Total 8 marks)