PPT-Unit 3 Lesson 1 Electric Charge and Static Electricity 2

What is electric charge?

Electric charge is a property that leads to electromagnetic interactions between the particles that make up matter.

What types of electric charges exist?

An object can have a positive charge, a negative charge, or no charge (neutral).

What particles make up an atom?

An atom consists of protons, neutrons, and electrons.

What charge does a proton have?

A proton has a charge of 1+.

What is the charge of a neutron?

A neutron has no charge.

What charge does an electron have?

An electron has a charge of 1–.

What happens when an atom has equal numbers of protons and electrons?

The atom has no overall charge and is neutral.

What is an ion?

An ion is an atom that has gained or lost electrons, resulting in an overall positive or negative charge.

What is the relationship between electric force and charge?

The greater an object’s charge, the greater the electric force it exerts.

What happens when two objects have like charges?

They repel each other.

What factors affect electric force?

The amount of charge and the distance between two charged objects affect electric force.

How does distance affect electric force?

The closer together the charged objects are, the greater the electric force is.

What are the three ways objects can gain or lose electrons?

Friction, contact, or induction.

What is static electricity?

Static electricity is the buildup of electric charge on an object.

What is electric discharge?

Electric discharge is the loss of charges from an object, which can happen slowly or quickly.

What is an electrical conductor?

An electrical conductor is a material through which charges can move freely.

What are good examples of electrical conductors?

Many metals, such as copper, are good electrical conductors.

What is an electrical insulator?

An electrical insulator is a material through which charges cannot move easily.

What are good examples of electrical insulators?

Plastic, rubber, glass, and dry air are all good electrical insulators.

What are semiconductors?

Semiconductors conduct electric charge better than insulators but not as well as conductors.

What principle describes that the total amount of charge stays the same?

This principle is called the conservation of charge.

What happens to an object when it gains electrons?

It becomes negatively charged.

What happens to an object that loses electrons?

It becomes positively charged.