How many poles does a bar magnet have?
None
One
Two
Which combination of magnetic poles will repel each other?
North and north
North and south
South and north
Which of these is a magnetic material?
Copper
Gold
Iron
What happens to an induced magnet when it leaves the magnetic field?
The magnetic poles swap places
The magnetism is lost
Its magnetism passes to the nearest magnetic material
What is the test for a permanent magnet?
The magnet attracts another magnet
The magnet repels a magnetic material
The magnet repels another magnet
Where is a magnetic field strongest?
In the middle of each field line
Where the arrow is marked on each field line
Where the field lines are closest together
In which direction are the arrows on a magnetic field line?
From south pole to north pole
From north pole to south pole
In the direction a south pole would feel the magnetic force
Why does the Earth have a magnetic field?
The Earth's core is magnetic
It is induced by the Sun's magnetic field
It is caused by the electricity we generate
What instrument can be used to map a magnetic field?
Ammeter
Electromagnet
Plotting compass
How does a solenoid achieve a much greater magnetic field than a bar magnet?
By adding together many small fields to make a large one
By having an iron bar in the middle
By having a few small loops which are close together