Year 8

What is magnetic field?

• a measurement of the total magnetic field which passes through a given area

• a region around a charged particle or object within which a force would be exerted on other charged particles or objects.

• a region around a magnet where a magnetic force can be experienced .

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both magnets will turn to the left

Why does a compass needle point north?

• Because it is being attracted to the Magnetic South Pole

• Because north is up to

• Because it is being attracted to the Magnetic North Pole

  Because north is down

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.

• No, because they point from north to south (they're supposed to go the other way).

• Yes, because the North pole is on the left in all pictures.

The strongest part of a magnet is

• The bars

• The Force fields

• The Poles

What kind of magnet can be turned on and off?

• Refridgerator magnet

• Electromagnet

• Ferromagnet

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric

• electric, wire, iron

• iron, electric, wire

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field decreases.

What happens when an electric current flows through a wire?

• A magnetic field is created around the wire.

• The wire begins to spin

• A field of gravity is created around the wire.