1. 8J Magnets and Electromagnets
Year 8

2. Pretest
QUICK QUIZ

3. 1. Which pair of materials are both magnetic materials?
silver and gold
iron and plastic
copper and steel
iron and steel
Response Grid

4. 2. Which statement is not true about magnetic materials?
They can be made into magnets.
They are repelled by magnets.
They are used in the magnets people put on fridge doors.
They are attracted to magnets.
Response Grid

5. 3. Which materials will block magnetism?
iron, steel and nickel
iron, steel and copper
copper, nickel and iron
aluminium and copper
Response Grid

6. 4. Which statement is not true?
A north pole attracts a south pole.
A south pole repels a south pole.
A south pole repels a north pole.
A north pole repels a north pole.
Response Grid

7. 5. The two ends of a magnet are called:
north and east.
east and west.
south and north.
south and west.
Response Grid

8. 6. Compass needles are made from magnets
6. Compass needles are made from magnets. One end of the needle always points:
north.
east.
in the direction you set it to.
towards London.
Response Grid

9. 7. Magnetic compasses are used for:
drawing circles.
telling the time using the Sun.
allowing people to find the direction they want to go in.
telling people how long a journey will take.
Response Grid

10. 8. You can make a compass by:
hanging a magnet on a thread.
hanging a needle on a thread.
sticking a magnet onto a cork.
sticking a needle onto a cork.
Response Grid

11. 9. A magnetic field is: a piece of ground with lots of iron in it.
the space around a magnet where it can attract magnetic materials.
the space around a magnet where it can attract all metals.
the space around a magnet where it repels magnetic materials.
Response Grid

12. 10. Which diagram shows the shape of the magnetic field of a bar magnet?
Response Grid

13. Participant Scores 8 Zoe Benton Molly Haley Gianluca Guglielmucci
Sarrah Turner 7
Emma Weeks

14. 11. The direction of a magnetic field is from:
south to north.
north to south.
west to east.
east to west.
Response Grid

15. 12. The north magnetic pole is:
near the north pole.
near the south pole.
at the north pole.
at the south pole.
Response Grid

16. 13. Which statement about electromagnets is not true?
They can be switched on and off.
They are always magnetic.
They are made from coils of wire.
They need electricity to make them magnetic.
Response Grid

17. 14. Which of these changes will make an electromagnet stronger?
Use more coils of wire.
Use a smaller current.
Use a wooden core.
Use fewer coils of wire.
Response Grid

18. 15. This diagram shows part of the circuit for an electric bell
15. This diagram shows part of the circuit for an electric bell. When the switch is pressed, which statement is true?
The electromagnet will repel the armature.
The electromagnet will attract the armature.
There is no current flowing in the circuit.
The electromagnet will light up.
Response Grid

19. 16. A relay is used in a car starter motor circuit so that:
the driver only touches the high current part of the circuit.
there are longer wires between the starter motor and the battery.
the car cannot be stolen.
the driver only touches the low current part of the circuit.
Response Grid

20. 17. A magnetic field around a wire is caused by:
the plastic coating on the wire.
the coils of wire.
an iron core inside the wire.
an electric current flowing through the wire.
Response Grid

21. 18. The shape of the magnetic field around an electromagnet is:
like the shape of the field around a bar magnet.
like the shape of a Christmas tree.
straight.
square.
Response Grid

22. 19. An iron core will make an electromagnet stronger because:
iron is a strong metal.
iron is a magnetic material and concentrates the magnetic field.
the coils of wire can be closer together if there is a core.
the core keeps the coils lined up properly.
Response Grid

23. 20. The magnetic field around a straight piece of wire is:
parallel to the wire.
square.
circular.
a spiral.
Response Grid

24. Participant Scores 18 Zoe Benton 14 Sarrah Turner Molly Haley
Millie Cornwell 13
William Bickley