Electromagnets

Electric currents produce _____________

• electron clouds

• magnetic fields

• sound waves

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

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NGSS.MS-ETS1-2

NGSS.MS-PS2-3

Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet
• an enemy

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

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NGSS.MS-PS2-3

You are making an electromagnet and can choose from a copper, iron or steel rivet.  Which sentence is true?

• You can use all of them because they are all made of metal
• You can use either iron or steel.
• You can only use the iron rivet.
• You can only use the copper rivet.

Tags

NGSS.MS-PS2-3

Samuel Morse, the inventor of the telegraph had a problem.  How can he increase the strength of the electromagnet in his telegraph?

• use thinner wire
• add more d-cells
• add a switch
• wind fewer wraps of wire around core

Tags

NGSS.MS-PS2-3

Tim made an electromagnet with one d-cell and wrapped an uninsulated wire 30 times.  It did not work.  How could he fix it?

• wrap the wire more times
• include a switch
• use insulated wire
• use another d-cell

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NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

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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.

How can we control an electromagnet?

• By turning the electricity on and off.

• By turning the kinetic energy on and off.

Tags

NGSS.MS-PS2-3

Which steps will you take to build an electromagnet?

• First, wrap the wire around a nail. Next, attach the ends of the wire to a battery to make an electric circuit.

• First, attach the ends of the wire to a battery to make an electric circuit. Next wrap the wire around a nail.