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Chapter 31 Alternating Current Chapter 31 Alternating Current AC power is what drives most of our electrical economy
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Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

May 01, 2018

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Page 1: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Chapter 31 – Alternating CurrentChapter 31  Alternating Current

AC power is what drives most of our electrical economy

Page 2: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

AC current

Page 3: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

A full-wave rectifier circuit

Page 4: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Current in the device I’m using right now

• A desktop PC draws current from a plug to the wall but what are the• A desktop PC draws current from a plug to the wall, but what are the details?

Page 5: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Resistors in an AC circuit

• Ohm’s Law applied in oscillatory fashion• Ohm s Law applied in oscillatory fashion.

Page 6: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Inductors in an AC circuit

• Replace the resistor in the previous slide with an inductor• Replace the resistor in the previous slide with an inductor.

Page 7: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Capacitance in an AC circuit

• Because this is a series circuit theBecause this is a series circuit, the current is the same through the capacitor as through the resistor just considered.

Page 8: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Comparing AC circuit elements

• Summary of circuit elementsSummary of circuit elements.• Frequency dependence of reactance

Page 9: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

The loudspeaker, a useful application

• The woofer (low tones)• The woofer (low tones) and the tweeter (high tones) connect in parallel through a “crossover ”through a crossover.

Page 10: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

The L-R-C circuit

Page 11: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

An L-R-C circuit II

Page 12: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Power in an inductor

• Consider current voltage and power as functions of timeConsider current, voltage, and power as functions of time.

Page 13: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Circuit behavior at resonance

• Look at the maximum I when the impedance is a minimum• Look at the maximum I when the impedance is a minimum.

Page 14: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Tuning a radio

Page 15: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Transformers

Page 16: Chapter 31 Alternating Current - PML · Chapter 31 – Alternating Current ... • Because this is a series circuit theBecause this is a series circuit, the current is the same ...

Transformers II