GCSE Standard Questions: The Motor Effect

Q6. Tommy did an investigation in class. The diagram below shows apparatus set up by Tommy.

(a)

(i) Explain why a force acts on the wire XY when the switch is closed.

[3 marks]

(ii) The force causes the wire XY to move. Draw an arrow on the diagram to show the direction in which the wire XY will move.

[1 mark]

(iii) State the effect that this experiment demonstrates.

[1 mark]

(b) Tommy replaces the battery with a low frequency alternating current (a.c.) power supply. He then closed the switch.

(i) Describe the movement of the wire.

[1 mark]

(ii) Give a reason for your answer to part (i)

[1 mark]

(Total 7 marks)