Electromagnet Review

What is an electromagnet?

• 
• 
• 

Tags

NGSS.MS-PS2-3

What do two unlike poles do when they are brought close together?

• They attract

• They repel

• Nothing

Tags

NGSS.3-PS2-3

The arrow on magnetic field lines shows them flowing in which direction?

• from South to North

• from North to South

• from left to right

What is one difference between electromagnets and bar magnets?

• Bar magnets can be turned off but electromagnets cannot

• Bar magnets have a magnetic field but electromagnets do not

• Electromagnets need electricity but bar magnets do not

Tags

NGSS.MS-PS2-3

How can you increase the magnetic field between two bar magnets?

• Move them farther apart.

• Drop them.

• Move them closer together.

• Heat them up.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following properties do all magnets have in common?

• North and South Poles

• Magnetic field lines.

• Strongest at the poles.

• Domains are all aligned in one direction.

What property of magnets is demonstrated in this image?

• Aligned domains.

• Opposites attract.

• Field gets weaker the farther you move away from the magnet.

• If you cut a magnet in half you get two magnets.

Tags

NGSS.MS-PS2-3

How is the magnetic field of an electromagnet decreased?

• Less coils of wire.

• Stronger battery.

• Longer wire.

• Iron core.

What is an electromagnet?

• Wire wrapped around a core.

• Wire next to a core.

• A magnet near a current.

• a magnet on top of a current.

Tags

NGSS.MS-PS2-3

If you move a coil of wire near a magnet, what will happen?

• current flows in the wire

• nothing

• a big surprise

• the wire will be repelled

Tags

NGSS.HS-PS2-5