1. Physics A First Course
Electricity
Chapter 13

2. Electricity Electric Circuits
13.2 Current and Voltage
13.3 Resistance and Ohm's Law

3. 13A Investigation: Electricity
Key Questions:
What is electricity?
How is electricity measured and described?
What is a circuit?
*Students read text section 13.1
AFTER Investigation 13A

4. 13A Investigation Topics
Identify conductors and insulators.
Measure voltage in a battery.
Measure current in a circuit.
Draw circuit diagrams.
Investigate how a dimmer switch works.

5. Chapter 13.1 Objectives and Vocabulary
Explain how electrical energy is supplied to devices in a circuit.
Use electrical symbols to draw simple circuit diagrams.
Distinguish between open and closed circuits.
electric current
electric circuit
circuit diagram
electrical symbols
resistor
closed circuit
open circuit
switch

9. Chapter 13.2 Objectives and Vocabulary
ampere
voltage
volt
voltmeter
multimeter
battery
ammeter
List the units used to measure current and voltage.
Describe how to measure current and voltage in a circuit.
Explain the function of a battery in a circuit.

12. 13B Investigation: Resistance and Ohm's Law
Key Questions:
What is the relationship between current, voltage and resistance?
How does a potentiometer work?
What is voltage drop and what does it tell you about where the electrical energy carried by the current is going?
*Students read text section 13.3
AFTER Investigation 13B

13. 13B Investigation Topics
Measure resistance in a circuit.
Use Ohm's law to identify the mystery resistor in a circuit.
Investigate how a potentiometer works.
Investigate the relationship between voltage drop across the potentiometer and voltage drop across the bulb in a circuit.

14. Chapter 13.3 Objectives and Vocabulary
Explain the relationships between current, voltage and resistance.
Use Ohm's law to calculate current, resistance, or voltage.
Distinguish between conductors and insulators.
resistance
ohm
Ohm's law
conductor
insulator
semiconductor
potentiometer