Magnetism

How can you demagnetize a magnet?

• By cooling it rapidly

• By heating it, hammering it, or exposing it to a strong opposing magnetic field.

• By placing it in a magnetic field of the same polarity

• By wrapping it in a copper wire and passing current through it.

What do the north and south poles of two magnets do to each other?

• They repel each other.

• They attract each other.

• They have no effect on each other.

• They create a magnetic field.

What are the two types of magnets?

• Temporary magnets and superconductors.

• Permanent magnets and electromagnets.

• Ferromagnetic materials and diamagnetic materials.

• Natural magnets and artificial magnets.

What happens when two magnets are brought close together?

• They always attract each other regardless of their poles.

• They can either attract or repel each other depending on their poles.

• They will not interact at all.

• They will explode due to magnetic forces.

What is magnetism?

• A force that can attract or repel certain materials, primarily metals like iron.

• A type of energy that can only repel materials.

• A phenomenon that occurs only in electrical circuits.

• A method of generating heat through friction.

What is an electromagnet?

• A type of magnet that becomes magnetized when an electric current flows through it.

• A permanent magnet that does not require electricity.

• A type of magnet that can only be used in high temperatures.

• A magnet that loses its magnetism when exposed to water.

What is the main material that makes up the Earth's core?

• Nickel

• Iron

• Copper

• Lead

What does it mean to repel?

• To attract

• To push away.

• To pull closer

• To ignore

What happens to an electromagnet when the electric current is turned off?

• The magnet's strength will decrease.

• The magnet will become a permanent magnet.

• The magnet will continue to attract metal objects.

• The magnet will increase in strength.

What is the role of iron in magnetism?

• Iron is a conductor of electricity.

• Iron is a ferromagnetic material that can be magnetized.

• Iron is a non-magnetic material.

• Iron is used to create permanent magnets.