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GCSE Standard Questions: The Motor Effect

Q1. A student investigates the electromagnetic force acting on a wire which carries an electric current. The wire is in a magnetic field. The diagram shows the circuit that the student uses.

(a) Draw an X on the diagram, with the centre of the X in the strongest part of the magnetic field.

(1 mark)

(b) Give one change that she can make to the magnets to decrease the electromagnetic force on the wire.

(1 mark)

(c) The student wants to change the electromagnetic force on the wire without changing the magnets or moving their position.

(i) Give one way in which she can increase the electromagnetic force.

(1 mark)

(ii) Give one way in which she can reverse the direction of the electromagnetic force.

(1 mark)

(Total 4 marks)