GCSE Standard Questions: The Motor Effect
Q2. Many electrical appliances use the circular motion produced by their electric motor.
(a) Underline the appliances from the list below which have an electric motor.
(2 marks)
(b) One simple design of an electric motor is shown in the diagram. It has a coil which spins between the ends of a magnet.
(i) Give two ways of reversing the direction of the forces on the coil in the electric motor.
Reverse (the direction of the) current or reverse the connections (to the battery) 
Reverse (the direction of the) magnetic field or reverse the (magnetic) poles
Do not credit 'swap the magnets (around)'
(2 marks)
(ii) Give two ways of increasing the forces on the coil in the electric motor.
Any two from:
- increase the strength of the magnet(s) or (magnetic) field
- increase the current (allow 'increase the voltage/p.d.' or allow add cells/batteries
- reduce the gap (between coil/armature and poles/magnets)
(2 marks)
(Total 6 marks)
About this site
