Circuits & Electromagnets

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above

The space around a magnet where the force of a magnet can attract best is called__________

• magnetism
• bar magnet
• horseshoe magnet
• magnetic field

What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

The strongest part of a magnet is...

• the bars.
• the force field.
• the poles. 
• the middle.

2 ways to increase the magnetic force of an electro-magnet

• Increase the current flow, reduce the number of coils
• Increase the voltage, decrease the number of coils
• Increase the number of coils and the current flow
• Spread out the coils, replace iron core with rubber.

Which of the following is non-magnetic in nature?

• Iron

• Nickel

• Cobalt

• Plastic

How are electromagnets different from magnets?

• magnets have a North and South pole

• you can turn an electromagnet on/off

• magnets are more powerful

What component becomes a temporary magnet when electricity is flowing through the circuit?

• iron nail

• copper wire

• battery

• switch

What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.
• Inserting a wooden core inside the coil
• Changing the direction of the current
• Decreasing the number of coils of wire