Electromagnets/Electricity

What type of energy does a battery store?

What is the compass aligned to initially? (when the wire is not connected to the battery)

• Earth's magnetic field

• The magnetic field of the battery

• The magnetic field of the wire

What happens to the compass when the wire is connected to the battery?

• Nothing happens to the compass

• The compass is repelled from the wire and it goes flying

• The compass starts to spin around endlessly

• The compass changes direction due to the magnetic field from the wire

How can you make an electromagnet?

• Wrapping a large coil of wire around a permanent bar magnet

• Letting a wire stick to the side of a bar magnet

• Wrapping a large coil wire around a ferromagnetic material and connecting to a battery

How does he turn the electromagnet off?

• Touching the wire with his hands

• By disconnecting it from the battery

• By pulling the screw out of the coils of wire

• He used "the force"

Arrows are close together on a force field when the force is

• stronger

• weaker

• opposite

Earth has a magnetic field that is similar to a bar magnet's magnetic field.

• true

• false

What do opposite pole on a magnet do?

• attract

• nothing

• repel

• all of the above

What do similar poles on a magnet do?

• nothing

• attract

• repel

• none of the above

How many poles does a magnet have?

• 4

• 5

• 2

• 6

• 9