Understanding Magnetism

Which of the following is true about magnetic materials?

• Magnetic materials produce their own magnetic field.

• Magnetic materials can be influenced by a magnetic field.

• Magnetic materials cannot become magnets.

• All magnetic materials are magnets.

What is a characteristic of permanent magnets?

• They only have a magnetic field when near another magnet.

• They produce their own magnetic field continuously.

• They lose their magnetism quickly.

• They are not made of magnetic materials.

How do induced magnets differ from permanent magnets?

• Induced magnets have a permanent magnetic field.

• Induced magnets are always repelled by permanent magnets.

• Induced magnets are not influenced by other magnetic fields.

• Induced magnets only have a magnetic field temporarily.

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

• It becomes stronger.

• It retains its magnetism permanently.

• It loses its magnetism.

• It becomes a permanent magnet.

Which material is considered magnetically hard?

• Iron

• Cobalt

• Nickel

• Steel