8J Quick Quiz
1 Which pair of materials are both magnetic materials?
A silver and gold B iron and plastic
C copper and steel D iron and steel
2 Which statement is not true about magnetic materials?
A They can be made into magnets.
B They are repelled by magnets.
C They are used in the magnets people put on fridge doors.
D They are attracted to magnets.
3 Which materials will block magnetism?
A iron, steel and nickel
B iron, steel and copper
C copper, nickel and iron
D aluminium and copper
4 Which statement is not true?
A A north pole attracts a south pole.
B A south pole repels a south pole.
C A south pole repels a north pole.
D A north pole repels a north pole.
1 The two ends of a magnet are called:
A north and east.
B east and west.
C south and north.
D south and west.
2 Compass needles are made from magnets. One end of the needle always points:
C in the direction you set it to.
D towards London.
3 Magnetic compasses are used for:
A drawing circles.
B telling the time using the Sun.
C allowing people to find the direction they want to go in.
D telling people how long a journey will take.
4 You can make a compass by:
A hanging a magnet on a thread.
B hanging a needle on a thread.
C sticking a magnet onto a cork.
D sticking a needle onto a cork.
1 A magnetic field is:
A a piece of ground with lots of iron in it.
B the space around a magnet where it can attract magnetic materials.
C the space around a magnet where it can attract all metals.
D the space around a magnet where it repels magnetic materials.
2 Which diagram shows the shape of the magnetic field of a bar magnet?
3 The direction of a magnetic field is from:
A south to north.
B north to south.
C west to east.
D east to west.
4 The north magnetic pole is:
A near the north pole.
B near the south pole.
C at the north pole.
D at the south pole.
1 Which statement about electromagnets is not true?
A They can be switched on and off.
B They are always magnetic.
C They are made from coils of wire.
D They need electricity to make them magnetic.
2 Which of these changes will make an electromagnet stronger?
A Use more coils of wire.
B Use a smaller current.
C Use a wooden core.
D Use fewer coils of wire.
3 This diagram shows part of the circuit for an electric bell.
When the switch is pressed, which statement is true?
A The electromagnet will repel the armature.
B The electromagnet will attract the armature.
C There is no current flowing in the circuit.
D The electromagnet will light up.
4 A relay is used in a car starter motor circuit so that:
A the driver only touches the high current part of the circuit.
B there are longer wires between the starter motor and the battery.
C the car cannot be stolen.
D the driver only touches the low current part of the circuit.
1 A magnetic field around a wire is caused by:
A the plastic coating on the wire.
B the coils of wire.
C an iron core inside the wire.
D an electric current flowing through the wire.
2 The shape of the magnetic field around an electromagnet is:
A like the shape of the field around a bar magnet.
B like the shape of a Christmas tree.
3 An iron core will make an electromagnet stronger because:
A iron is a strong metal.
B iron is a magnetic material and concentrates the magnetic field.
C the coils of wire can be closer together if there is a core.
D the core keeps the coils lined up properly.
4 The magnetic field around a straight piece of wire is:
A parallel to the wire.
D a spiral.