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Electricity Electric Circuits

Electricity Electric Circuits. 13.1 Electric Circuits 13.2 Current and Voltage 13.3 Resistance and Ohm's Law. Key Questions: What is electricity? How is electricity measured and described? What is a circuit ?. 13A Investigation: Electricity. 13A Investigation Topics.

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Electricity Electric Circuits

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  1. ElectricityElectric Circuits • 13.1 Electric Circuits • 13.2 Current and Voltage • 13.3 Resistance and Ohm's Law

  2. Key Questions: What is electricity? How is electricity measured and described? What is a circuit? 13A Investigation: Electricity

  3. 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.

  4. 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. Chapter 13.1 Objectives and Vocabulary • electric current • electric circuit • circuit diagram • electrical symbols • resistor • closed circuit • open circuit • switch

  5. 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. Chapter 13.2 Objectives and Vocabulary

  6. 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? 13B Investigation: Resistance and Ohm's Law

  7. 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.

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

  9. Do We Understand Simple Series Circuits? Problem #1 A circuit is made of a 48 v battery and three resistors connected in series. R1 has a resistance of 2 Ω, R2 has a resistance of 4 Ω, and R3 has a resistance of 6 Ω. A) Draw the circuit diagram. B) Find the total resistance. C) Find the circuit current. D) Find V1, V2, and V3.

  10. Problem #2 • A circuit is made of a 60 volt battery and three resistors connected in series. R1 has a resistance of 5 Ω, R2 has a resistance of 10 Ω, and R3 has a resistance of 15 Ω. • A) Draw the circuit diagram. • B) Find the total resistance. • C) Find the circuit current. • D) Find V1, V2, and V3.

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