Permanent

If more domains are aligned inside a permanent magnet, it will be

• weaker

• stronger

• electrically charged

• non-magnetic

If less domains are aligned inside a permanent magnet, it will be

• weaker

• stronger

• electrically charged

• non-magnetic

What are permanent tissue

• Cells that do not divide

• Cells that have a specific function

• Cells that have a specific shape

• All

If a permanent magnet is cut into two pieces, what happens to its magnetic properties?

• Each piece becomes a separate magnet with its own north and south poles

• The magnetic properties are lost

• The pieces repel each other

• The pieces attract each other

Which of the following is a characteristic of a permanent magnet?

• It requires an external power source to maintain its magnetism

• It can be easily demagnetized by heating

• It retains its magnetism without external influence

• It is made of non-metallic materials

What is the primary difference between permanent and temporary magnets?

• Permanent magnets are made of iron, while temporary magnets are not

• Permanent magnets retain their magnetism indefinitely, while temporary magnets do not

• Permanent magnets are always stronger than temporary magnets

• Permanent magnets are used in electromagnets, while temporary magnets are not

In which of the following applications would a permanent magnet most likely be used?

• In a refrigerator door seal

• In an electromagnet for a scrapyard crane

• In a temporary holding device

• In a battery

What happens to the magnetic domains in a material when it becomes a permanent magnet?

• The domains become randomly oriented

• The domains align in the same direction

• The domains disappear

• The domains become electrically charged

Which material is commonly used to make permanent magnets?

• Copper

• Aluminum

• Steel

• Plastic

How can a permanent magnet be demagnetized?

• By cooling it to absolute zero

• By heating it above its Curie temperature

• By placing it in a vacuum

• By submerging it in water

Tags

NGSS.MS-PS1-4