Magnetism and Magnetic Materials

Which of the following is a magnetic material but not always a magnet?

• Plastic

• Wood

• Glass

• Nickel

What is a permanent magnet?

• A magnet that is made of plastic

• A magnet that only works when near another magnet

• A magnet that produces its own magnetic field all the time

• A magnet that loses its magnetism quickly

How is an induced magnet created?

• By cooling a piece of metal

• By placing a magnetic material in the field of a permanent magnet

• By painting a piece of metal

• By heating a piece of metal

What happens to an induced magnet when it is removed from the magnetic field?

• It becomes heavier

• It becomes a permanent magnet

• It changes color

• It loses its magnetism

What do we call materials that lose their magnetism quickly?

• Induced magnets

• Magnetically soft materials

• Magnetically hard materials

• Permanent magnets