Understanding Magnets and Magnetic Materials

What defines a true magnet?

• An object that produces a magnetic field

• An object influenced by a magnetic field

• Any magnetic element

• A type of magnetic material

What mnemonic can help remember the common magnetic elements?

• CSI

• FBI

• NCIS

• NASA

Which of the following is not a common magnetic element?

• Copper

• Iron

• Cobalt

• Nickel

What is a permanent magnet?

• A temporary magnet

• A magnet that produces its magnetic field constantly

• A magnet that can be turned on and off

• A magnet that loses its magnetism over time

How is an induced magnet created?

• By heating a magnetic material

• By placing a magnetic material in a permanent magnet's field

• Through electrical induction only

• By cooling a magnetic material

What happens to the magnetism of an induced magnet when removed from the magnetic field?

• It increases

• It becomes permanent

• It remains unchanged

• It loses its magnetism

What is the force between a permanent and an induced magnet?

• Repulsive

• Attractive

• Variable

• Non-existent

Which materials lose their magnetism quickly?

• Permanent magnets

• Magnetically soft materials

• Non-magnetic materials

• Magnetically hard materials

What are magnetically hard materials characterized by?

• Losing magnetism quickly

• Retaining magnetism over a longer period

• Being non-magnetic

• Being poor conductors of electricity