Magnetism Quiz

What are the ends of a magnet called?

• Tips

• Poles

• Edges

• Centers

Which poles of a magnet repel each other?

• South and South

• East and West

• North and North

• North and South

What happens when two magnets are held close together?

• They always repel

• They attract if like poles

• They repel if like poles

• They always attract

Which materials are attracted to a magnet when unmagnetized?

• Induced magnets

• Permanent magnets

• Magnetic materials

• Non-magnetic materials

What is the advantage of using electromagnets?

• They are not affected by electricity

• They can be magnetized and demagnetized easily

• They are cheaper than permanent magnets

• They are always permanent magnets

What is the metal normally used for making electromagnets?

• Copper

• Steel

• Aluminum

• Gold

What is the main application of MRI scanners in hospitals?

• Monitoring heart rate

• Performing surgeries

• Producing X-ray images

• Producing diagnostic images of body organs

How can the strength of the magnetic field around a solenoid be increased?

• Decreasing the current flowing through the wire

• Removing the iron core

• Decreasing the number of coils

• Increasing the size of the current flowing through the wire