Static Electric

Select all that describe insulators.

• allow charges to flow easily

• do not allow charges to flow easily

• plastic

• metal

• surround a wire

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.

• the silk has become negatively charged.

• protons have moved to the rod.

• glass attracts more protons.

If two objects with static charge are attracted, what do you know about them?

• They are both positively charged.

• They are both negatively charged.

• One is positively charged and one is negatively charged, but you won't be able to tell which is which.

• One is positively charged and one is negatively charged, and you can tell which is which by looking at them.

Tags

NGSS.MS-PS2-3

If two charges repel each other, the two charges could be

• Positive and neutral

• Positive and negative

• positive and neutral

• negative and negative

Tags

NGSS.MS-PS2-3

Objects that have opposite charges

• are attracted to each other, and the force between the objects pulls them together.

• are attracted to each other, and the force between the objects pushes them apart.

• are repelled by each other, and the force between the objects pulls them together.

• are repelled by each other, and the force between the objects pushes them apart.  

Tags

NGSS.MS-PS2-3

The build up of electric charges on the surface of objects is known as

• electricity

• static electricity

• a circult

• electric force

The comb has been rubbed with a piece of wool fabric and placed next to some scraps of paper.<\/p>

Some paper moves toward the comb. The movement of the paper is caused by<\/p>

• static electricity<\/p>

• mechanical energy<\/p>

• chemical energy<\/p>

• magnetic attraction<\/p>

Tags

NGSS.MS-PS2-3

Two balloons are hanging from a stick.

Both balloons have a positive charge.

How would you expect the balloons to move?

• there would be no movement

• towards each other

• away from each other

Tags

NGSS.MS-PS2-3

Two balloons are hanging from a stick.

One balloon has a positive charge and the other has a negative charge.

How would you expect the balloons to move?

• there would be no movement

• towards each other

• away from each other

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Look at the set of objects to the right. We could

increase the electric force between Object A and

Object B by each of the following EXCEPT:

• Pushing them farther apart.

• Increasing the difference between their charges.

• Moving them closer together.

• Adding lots of negative charges to Object A.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5