Unit 9 "Non-Contact Forces" Test Review Practice

Electric Force is...

• 
  a push or pull between charged objects

• a push between charged objects

• 
  a pull between charged objects

• a push or a pull between uncharged objects

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Objects that have unlike charges...

• spin

• explode

• 
  repel/push away from each other

• attract/pull towards each other

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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-PS2-5

Will these two magnets attract or repel?

• 
  Attract

• 
  Repel

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NGSS.MS-PS2-3

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Two magnets pull on each other. What can make the magnets pull with LESS force?

• Add heat to one magnet.

• Use two stronger magnets.

• Turn both magnets around.

• Move magnets farther apart.

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NGSS.MS-PS2-3

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You have two pairs of charged objects interacting with each other.

The first pair (A and B) are 10 cm apart.

A has a +1 charge and B has a -1 charge.

Pair C and D are 17cm apart.

C has a +1 charge, and D has a -1 charge.

Which of these statements is true?

• There are no electric forces because the charges in each pair of objects cancel.

• The electric force between A and B is smaller than the electric force between C and D.

• The electric force between A and B is greater than the force between C and D.

• 
  The electric force between A and B is identical in magnitude to the electric force between C and D.

Tags

NGSS.MS-PS2-3

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What happens to the electric force between the objects when you increase the distance between a positively charged object and a negatively charged object? (Everything else remains constant.)

• The electric force decreases.

• The electric force increases.

• The electric force remains constant.

• There is not enough information to answer the question.

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NGSS.MS-PS2-3

Which has a charge with the greatest magnitude?

• An object with a charge of 0.

• An object with a charge of -2

• An object with a charge of -3

• An object with a charge of +2

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NGSS.MS-PS2-3

Which is a characteristic of an INSULATOR?

• The object holds on tightly to their positive charges.

• The object does not hold on tightly to their positive charges.

• The object does not hold on tightly to their negative charges.

• The object holds on tightly to their negative charges.

Tags

NGSS.MS-PS2-3

A plastic rod is rubbed with a piece of wool and becomes negatively charged. Which object will the rod MOST likely be attracted to?

• A wooden table with no overall charge.

• Another plastic rod that is also negatively charged.

• A metal spoon.

• A glass rod that is positively charged.

Tags

NGSS.MS-PS2-3

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