Which statement is not true?
A south pole repels a north pole.
A south pole repels a south pole.
A north pole attracts a south pole.
A north pole repels a north pole.
Which pair of materials are both magnetic materials?
silver and gold
iron and plastic
copper and steel
iron and steel
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.
Which of these is NOT a reason why electromagnet are used?
They can be switched off.
They are more expensive.
Their strength can be controlled.
They can be very strong.
A magnetic field is:
a piece of ground with lots of iron in it.
the space around a magnet where it attracts magnetic materials.
the space around a magnet where it attracts all metals.
the space around a magnet where it repels magnetic materials.
Which diagram shows the shape of the magnetic field of a bar magnet?
The direction of a magnetic field is from:
the south pole to the north pole.
the north pole to the south pole.
the west pole to the east pole.
the east pole to the west pole.
The Earth’s north magnetic pole is:
near the North pole.
near the South pole
at the North pole.
at the South pole.
Magnetism is a non-contact force.
Two pieces of iron attract each other.
An electromagnet needs electricity.
Bar magnets are permanent magnets.
A magnet will attract a steel can.
Electromagnets often have iron cores.