Electricity

An excess or shortage of electrons produces a net electric charge.

• electric charge

• electric forces

• electric fields

• static electricity

Like charges repel and opposite charges attract.

• electric charge

• electric forces

• electric fields

• static electricity

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The strength of a field depends on the net charge and distance from the charge.

• electric charge

• electric forces

• electric fields

• static electricity

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Charge can be transferred by friction, contact, and induction.

• electric charge

• electric forces

• electric fields

• static electricity

The two types of electric charge are positive and __________.

In an atom, negatively charged electrons surround a positively charged nucleus.

• True

• False

Answer explanation

Tags

NGSS.MS-PS1-1

If a neutral atom gains one or more electrons, it becomes a positively charged ion.

• True

• False

Answer explanation

A neutral atom gaining electrons means that it is gaining more negatively charged particles. If an atom has more negatively charged particles than positively charged particles, it will have a net negative charge.

Which of the following statements are true about electric force?

• Like charges attract and opposite charges repel.

• Electric force is the attraction or repulsion between electrically charged objects.

• Electric force is inversely proportional to the amount of charge.

• Electric force is inversely proportional to the square of the distance between two charges.

Inside an atom, electric forces are __________ than gravitational forces.

Answer explanation

The electrical forces in an atom need to be stronger than gravitational forces in order for the atoms to remain in tact even when gravity is present.

Tags

NGSS.HS-PS2-4

Which of the following are factors that the strength of an electric field depends on?

• the direction of the field

• whether the charge is positive or negative

• the amount of charge that produces the field

• the distance from the charge

Tags

NGSS.MS-PS2-3