ELEKTROMAGNET

What does attract mean?

• to pull apart
• to jump
• to come together
• to shop

Where is the force of attraction the strongest on a magnet?

• at the poles
• in the middle
• above the magnet
• below the magnet

What happens when two bar magnets repel each other?

• The poles of the magnets pull toward each other.
• The poles of the magnets push away from each other.
• The centers of the magnets pull toward each other.
• The centers o the magnets push away from each other.

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric
• electric, wire, iron
• iron, electric, wire

What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

What happens when a wire is wound into a coil around an iron core in an electromagnet?

• the wire exolodes
• you get electrocuted 
• the magnetic field becomes stronger
• the magnetic field becomes weaker

While electric current is flowing through a wire, what surrounds the wire?

• a magnetic field
• a glowing light
• neutrons
• protons

How do you make an electromagnet?

• wrap a battery in wire and connect it to an iron nail.
• wrap a wire with another wire and connect it to an iron nail.
• wrap an iron nail in wire and connect it to a power source.
• wrap an iron nail in wire and connect it to another iron nail.

How can you DECREASE the strength of an electromagnet?

• Wrap the wire around an iron core
• Increase the current running through the wire
• Decrease the current running through the wire

Tags

NGSS.HS-PS2-5