Physics A First Course Electricity Chapter 13

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

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

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.

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

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.

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

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.

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