Chapter 8: Magnetism

Which of these makes use of magnets in a hospital?

• X-Ray Scanners

• MRI machines

• Heart rate monitor

• Stethoscope

Which one of these doesn't make use of a magnet?

• Speakers

• Microphones

• Electric guitars

• Ovens

Name a magnetic element.

The image shows the magnetic fields created by two magnets brought next to each other.

Ignoring the arrows, what are the possible poles in the middle of the diagram?

Choose all the possible correct answers.

• North and South

• North and North

• South and South

• East and West

Which of these is a property of magnets?

• They have 4 poles

• They are all metals

• They are gases at room temperature

• They are brittle

Which of these is not a common magnet shape?

• Bar

• Horseshoe

• Point

• Ring

Based on these pictures, which one is likely to be magnetic?

• 
• 
• 
• 

The image shows some compasses surrounding a magnet.

The red arrow of a compass shows its North pole.

What is pole X?

A magnet is brought near a metal alloy made of zinc, aluminium and cobalt.

What behaviour do you expect to observe?

• Nothing happens

• The alloy is attracted

• The alloy is repelled

• The magnet is repelled

Which of these would not demagnetise a magnet?

• Blasting it with fire

• Hitting it repeatedly with a hammer

• Putting it near a very strong magnetic field

• Placing it in the freezer