Core questions – Physics unit 7 – Magnetism and electromagnetism

What are the poles of a magnet?

• The place where the magnetic forces are strongest

• The center of the magnet

• The place where the magnet is weakest

• The ends that do not attract anything

What happens when two magnets are brought close to each other?

• They exert a force on each other

• They lose their magnetism

• They melt

• They break into pieces

What happens when two like poles of magnets are brought close to each other?

• They repel each other

• They attract each other

• They stick together

• Nothing happens

What happens when two unlike poles of magnets are brought close to each other?

• They attract each other

• They repel each other

• They lose their magnetism

• Nothing happens

What type of force is magnetism an example of?

• A non-contact force

• A frictional force

• A gravitational force

• A muscular force

What is a permanent magnet?

• One which produces its own magnetic field

• One which loses its magnetism easily

• One which is made of soft iron

• One which requires electric current to work

What is an induced magnet?

• A material that becomes a magnet when it is placed in a magnetic field

• A magnet that loses its magnetism permanently

• A material that cannot be magnetized

• A magnet that is always magnetic

What happens to an induced magnet when it is taken out of a magnetic field?

• It loses most/all of its magnetism quickly

• It becomes a permanent magnet

• It gains more magnetism

• It starts to repel all other magnets

What is the only force that is caused by an induced magnet?

• A force of attraction

• A force of repulsion

• A force of friction

• A force of gravity

What is a magnetic field?

• The region around a magnet where a force acts on another magnet or on a magnetic material

• A type of electric current that flows through wires

• A region where sound waves travel faster

• The area where light cannot pass through