Unit 13. Magnets

You may be able to use an instrument called an _________ to measure the current flowing in the coil.

• Ammeter

• Thermometer

• Amplifier

The compass needle is a small magnet with north and south poles. Which pole points towards the north?

• The north pole

• The south pole

• The west pole

• The east pole

Why does the compass needle turn? Choose the correct explanation from the list below.

• The ends of the compass needle are painted different colours

• The case of the compass is made of a magnetic material

• The Earth has magnetic field

• The Earth rotates on its axis once each day

State whether the magnets will attract or repel each other.

• attract

• repel

State whether the magnets will attract or repel each other.

• attract

• repel

State whether the magnets will attract or repel each other.

• attract

• repel

Non Magnetic Material is ____________________

• Iron

• Aluminum

You may have noticed that the force is strongest if you use

• the end of the magnet

• middle of the magnet

• cover the magnet with a plastic bag

Magnetic power is more in the middle of bar magnets.

• True

• False

 

____________________magnets retain their properties only for a short period of time.

• Temporary

• Permanent