electromagnetism

This picture best illustrates the construction of a(n)

• magnet

• electromagnet

• series circuit

• parallel circuit

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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NGSS.MS-PS2-3

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-PS2-3

NGSS.MS-ETS1-2

A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.
• B. motor.   
• C. magnet.
• D. transformer.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

• attract, repel

• repel, repel

• attract, attract

• repel, attract

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NGSS.MS-PS2-3

The picture above is an example of what?

• Magnetic field

• Electric field

• Repulsion

• Attraction

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

What would happen with the magnets in the picture above?

• They would repel

• Nothing

• They would attract

• They would repel and then attract

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NGSS.MS-PS2-3

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If the north pole of a magnet is brought close to the south pole of another magnet, what will happen?

• They will atrract each other

• They will repel each other

• They will demagnitize

• The south pole will turn around so the north pole is facing the other magnet.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which part of a circuit is responsible for "pushing" charges around a circuit?

• Electrical devices

• Power source

• The wire

• None of the above

What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field is doubled.

• The strength of the magnetic field decreases.

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NGSS.MS-PS2-3