Magnet3-Form3

What is an electromagnet?

• a permanent magnet with a north and south pole

• a temporary magnet made from current carrying wire around a magnetic metal core

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This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Remove all the coils and the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Add more coils of wire to the nail.

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Why do you think the compass needle is moving when is near to electromagnet?

• Because of the magnetic field generated in the wire.

• Because of the electricity generated in the compass.

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Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet

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

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

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NGSS.MS-PS2-5

A type of magnet that has temporary magnetic effect when electric current flows through it.

This refer to

• Electric

• Electronic

• Electrostatic

• Electromagnet

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What is this?

• magnet
• electromagnet
• series circuit
• parallel circuit

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

• wire, iron, electric

• electric, wire, nail

• iron, electric, wire

• excited, hair, apple

Which of the following uses an electromagnet?

• relay switch

• water filter

• refrigerator door seal

• comb

Which one below would destroy a magnet?

• paint

• water

• heat

• light