1. Physics A First Course
Electricity
Chapter 15

2. Electricity Electrical Charges and Forces
15.1 Electric Charge and Current
15.2 Electric Current, Resistance, and Voltage
15.3 Capacitors

3. 14A Investigation: Electric Charge
Key Question:
What is "static" electricity?
*Students read text section 15.1
AFTER Investigation 15A

4. 15A Investigation Topics
Observe electric charge.
Build an electroscope.
Charge electroscope with objects.
Observe behavior of electroscope.

5. Chapter 15.1 Objectives and Vocabulary
Distinguish between a positive and negative net charge.
Explain the meaning of Coulomb's law.
Describe different ways of charging an electroscope.
coulomb
electrically neutral
charged
static electricity
Coulomb's law
electroscope
charging by contact
charging by friction
polarized
charging by induction

9. 15B Investigation: The Flow of Electric Charge
Key Question:
How many electrons move when current flows?
*Students read text section 15.2
AFTER Investigation 15B

10. 15B Investigation Topics
Build electric circuits.
Use resistors.
Measure voltage.
Use potentiometers.
Use capacitors.
Measure current.
Graph current vs. time.
Calculate flow of charge.
Estimate number of electrons flowing in a current.
Calculate number of electrons flowing in a current.

11. Chapter 15.2 Objectives and Vocabulary
superconductor
Describe the relationship between electrons and current.
Explain, at the atomic level, the difference between insulators, semiconductors, and conductors.
Identify how voltage and charge are related.

13. Chapter 15.3 Objectives and Vocabulary
Calculate power in a circuit.
Calculate the cost of running an appliance.
Distinguish between alternating and direct current.
kilowatt

15. Three Factors Determine Capacitance