Electric Charges and Forces

Electrical charges that are the same _ and when charges are different they _

• attract, attract

• attract, repel

• repel, attract

• repel, repel

Tags

NGSS.MS-PS2-3

The buildup of electric charges on an object is called

• current

• power

• voltage source

• static electricity

What is the transfer of electrons from 1 uncharged object to another by rubbing?

• charging by conduction

• charging by induction

• charging by friction

In charging by induction, objects do not touch.

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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.

You have 2 circular objects, and each has a positive charge near each other, but not touching. Which statement describes the force that is exerted on the objects due to their electric charge?

• There is a force pushing both objects to the left.

• There is a force pulling the objects toward each other.

• There is a force pushing the objects away from each other.

• There is no force on the objects due to their electric charge.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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.HS-PS2-4