Electric, Magnetic, and Gravity Review

Which of the two below result in an attractive force?

• A positive charge and a negative charge

• Two negative charges

• Two south poles

• A north pole and a south pole

• Two postive charges

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NGSS.MS-PS2-3

Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?

• The poles facing one another are both south poles

• The poles facing one another are both north poles

• The poles facing one another are opposite poles

• One magnet was bigger than the other

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

To decrease the strength of a magnetic field around an electromagnet, we must

• increase the number of coils

• increase the size of the iron core

• decrease the size of the iron core

• decrease the number of coils

Tags

NGSS.MS-PS2-3

Determine whether the following will attract or repel one another. Similar charges.

• repel

• attract

Tags

NGSS.MS-PS2-3

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Opposites _________ and like charges ____________.

• attract, repel
• repel, attract

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Static electricity is when __________ builds up.

• protons
• neutrons
• electrons

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NGSS.MS-PS2-5

A piece of fur was rubbed on a pvc pipe. When the pipe was placed near an aluminum can, the can started to roll toward the pvc pipe. The pipe exerts an electric force on the can because:

• The pipe has a positive charge and the can has a negative charge.

• Electrons rubbed off onto the pipe so it has a negative charge.

• Both have a negative charge.

• Electrons rubbed off onto the pipe giving it an attractive positive charge.

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NGSS.MS-PS2-3

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Choose the words that will correctly complete the statement below about the relationship between distance and strength of the magnetic field: As the distance between magnets _____________, the repulsive force ______________.

• increases, increases

• increases, decrease

• decreases, decreases

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5