Grade 7 Physics Quiz: Magnet

What are the two main types of magnets?

• North and South magnets

• Metal and plastic magnets

• Positive and negative magnets

• Permanent magnets and electromagnets

Name one natural material that is a permanent magnet.

• Glass

• Magnetite

• Aluminum

• Plastic

What is a magnetic field?

• The sound produced by a vibrating guitar string

• A type of metal used in construction

• The force of gravity between two objects

• A region around a magnetic material or a moving electric charge within which the force of magnetism acts.

How is the direction of a magnetic field represented?

• Numbers

• Lines of force

• Squiggly lines

• Dots

What are the two ends of a magnet called?

• Top and bottom

• North pole and south pole

• Front and back

• Left and right

Explain the concept of magnetic poles.

• Regions on a magnet where the magnetic force is the weakest

• Points on a magnet where the magnetic force is directed inward

• Regions on a magnet where the magnetic force is the strongest

• Areas on a magnet where there is no magnetic force

What is magnetic force?

• The force exerted by electricity on a magnetic material

• The force exerted by wind on a magnetic material

• The force exerted by gravity on a magnetic material

• The force exerted by a magnet or a magnetic field on a magnetic material.

How does the distance between two magnets affect the magnetic force between them?

• The magnetic force becomes repulsive

• The magnetic force decreases

• The magnetic force increases

• The distance has no effect on the magnetic force

What is electromagnetism?

• Study of chemical reactions

• Study of sound waves

• Study of gravitational force

• Study of electromagnetic force

Give an example of how electromagnets are used in everyday life.

• Refrigerator, microwave, toaster

• Television, computer, smartphone

• Doorbell, speakers, MRI machines

• Car engine, bicycle, airplane