Electrical Force

A repelling force occurs between two charged objects when the charges of are of __________.

• like signs

• unlike signs

• equal magnitude

• unequal magnitude

Tags

NGSS.MS-PS2-3

An attracting force occurs between two charged objects when the charges are of _______________.

• like signs

• unlike signs

• equal magnitude

• unequal magnitude

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

NGSS.MS-PS2-5

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.

Tags

NGSS.MS-PS2-3

What happens when a neutral material becomes attracted to a negatively charged object that is brought near it?

• It doesn't become attracted.

• The charges in the neutral object move around because of the nearby charged object.

• The neutral material will repel the negatively charged object.

• The neutral material loses some of it's positive charges.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

You rub two objects together briefly, and one attracts a few pieces of paper. What happens when the objects are rubbed together for a longer period of time?

• Nothing will happen because nothing has changed.

• The object will attract more pieces of paper because more time has passed.

• The object will attract more pieces of paper because the magnitude of the charge has increased.

• The objects will now repel.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The ___________ _____________ is the force of attraction or repulsion between objects due to their charges.

• electric charge

• electric force

• distance

• variable

Tags

NGSS.MS-PS2-3

When you walk across a carpet in socks, they pick up charges. Later, there aren't any charges in your socks. what probably happened to the charges?

• The charges disappeared.

• The charges switched signs.

• The charges transferred to another object.

• The charges broke apart into smaller particles.

Tags

NGSS.MS-PS2-5

What happens when a rubber rod is rubbed with a piece of fur, giving the rod a negative charge?

• Negative charges are moved from the rod to the fur.

• Negative charges are moved from the fur to the rod.

• Negative charges are added to the rod and the fur remains neutral.

• Positive charges are removed from the rod, and the fur remains neutral.

Tags

NGSS.MS-PS2-3

When you rub a neutral balloon on neutral carpet, the balloon will attract hair. What happened to the electric charge of the balloon?

• Nothing, the hair's charge changed.

• The charge of the balloon changed.

• It became opposite.

• It stays neutral.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5