Electromagnet Summary

A compass needle points north because of Earth's magnetic field unless

• it is close to a wire with a current

• it is close to any wire

• it is close to a battery

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The magnetic field inside the coil shown below is directed:

• Into the page

• Out the Page

• To the left

• Towards the bottom of the page

Tags

NGSS.HS-PS2-5

What type of magnet that can turned on and off?

• electromagnet

• permanent magnet

• electricity

• battery

What would happen if you took one end of the wire off the battery?

• The nail will be a magnet.

• The nail would no longer be a magnet

• Nothing will happened.

• The nail will heats up.

Tags

NGSS.MS-PS2-5

Which part of the electromagnets turned into a magnet when electricity flows through a coiled wire?

• Battery

• Copper wire

• Iron Nail

• Bulb

Surrounding every magnet is a __________  __________.

• magnetic field

• electrical current

• another magnet

• an enemy

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

• excited, hair, apple

What is the role of the battery in the electromagnet?

• It provides light energy for the electromagnet.

• It provides magnetic field for the electromagnet.

• It provides sound energy for the electromagnet.

• It provides the power source for the electromagnet.

What must the student do in the picture, in order to induce electricity and move the the galvonometer

• nothing

• move the magnet

• add more loops of wire

• unplug the galvnonmeter

Tags

NGSS.HS-PS2-5

Electromagnets are useful in industry such as a junk yard because they

• have strong north and south poles

• are easy to lift

• can be turned off and on