# 16-2 Electric Charge in the Atom

Tags 16-1 Static Electricity

16-2 Electric Charge in the Atom

16-3 Insulators and Conductors

16-4 Induced Charge; The Electroscope

16-5 Coulomb’s Law

16-6 Solving Problems Involving Coulomb’s Law and Vectors

Objectives:

1. What are the basic components of the law of conservation of electric charge?

2. How do charges function in the atom?

3. Compare and contrast conductors and insulators.

4. How is an electroscope a good experimental example of induction?

5. What relationship does Coulomb’s law establish?

6. How is electric charge quantized?

7. How is Coulomb’s law related to law of universal gravitation?

8. What vector relationships are exemplified by Coulomb’s law?

Homework Problems: 1-17 pp.465-466

Formula Search –Find all formulas state thier units and purpose in making calculations.

Vocabulary to Know:

AmberConductorForce

Static electricityInsulatorsCoulomb’s Law

Electric charge SemiconductorsPoint charge

Positive Free electronsCoulomb

Negative Conduction electronsMagnetic field

Proton Charge by conductionElementary charge

Electron InducedQuantized

Neutron GroundPermittivity of free space

Ion ElectroscopeElectrostatics

Polar ElectrometerElectrostatic force

“Leak-off” RepulsionCoulomb force

Principle of SuperpositionVector

16-1 Static Electricity:

1. How is static electricity created?

2. Explain the concepts of electric charge.

3. Explain the origin of the types of electric charge.

4. Explain the principles for the law of conservation of electric charge.

16-2 Electric Charge in the Atom:

1. Describe a simple atom.

2. Describe how an atom becomes an ion.

3. How is the mobility of electrons important in establishing charge?

4. How does the polarity of water create a situation that causes charge to “leak-off?”

16.3 Insulators and Conductors:

1. Compare and contrast conductors and semiconductors.

2. How do semiconductors handle charge?

3. Explain the difference between free electrons and conduction electrons in reference to charge.

16-4 Induced Charge; The Electroscope:

1. How are object charged by conduction.

2. Explain two ways objects are charged by induction.

3. How does charge separation occur in nonconductors?

4. Explain how an electroscope is a good experimental device to demonstrate conduction

and induction.

16-5 Coulomb’s Law:

1. Create a list of points discovered in Coulomb’s experiment.

2. What does Coulomb’s law describe?

3. How is Coulomb’s law connected to Newton’s third law?

4. Explain the relationship of “k” to a Coulomb.

5. Compare and contrast the value of an elementary charge.

6. Why is electric charge quantized?

7. Compare and contrast the law of universal gravitation and Coulomb’s law.

8. Explain the purpose of the permittivity of free space.

9. What are point charges?

10. What is electrostatics?

11. What is ignored in calculating Coulomb’s law?

16-6 Solving Problems Involving Coulomb’s Law and Vectors:

1. How is a force like a vector?

2. Explain the trigonometric equations used to solve vectors, use a diagram and

formulas to aid in your explanation.

3. State some rules involved in calculating charge and force on multiple charges.

Double the distance, force drops by ¼.

Double both charges, force increases by a factor of 4.