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Chapter 14

Chapter 14. Resistive AC Circuits. Objectives. After completing this chapter, you will be able to: Describe the phase relationship between current and voltage in a resistive circuit Apply Ohm’s law to AC resistive circuits Solve for unknown quantities in series AC resistive circuits.

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Chapter 14

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  1. Chapter 14 Resistive AC Circuits

  2. Objectives • After completing this chapter, you will be able to: • Describe the phase relationship between current and voltage in a resistive circuit • Apply Ohm’s law to AC resistive circuits • Solve for unknown quantities in series AC resistive circuits

  3. Objectives (cont’d.) • Solve for unknown quantities in parallel AC resistive circuits • Solve for power in AC resistive circuits

  4. Basic AC Resistive Circuits Figure 14-1. A basic AC circuit consists of an AC source, conductors, and a resistive load.

  5. Basic AC Resistive Circuits (cont’d.) Figure 14-2. The voltage and current are in phase in a pure resistive circuit.

  6. Series AC Circuits Figure 14-3. Simple series AC circuit.

  7. Figure 14-4. The in-phase relationship of the voltage drops, applied voltage, and current in a series AC circuit.

  8. Parallel AC Circuits Figure 14-5. A simple parallel AC circuit.

  9. Figure 14-6. The in-phase relationship of the applied voltage, total current, and individual branch currents in a parallel AC circuit.

  10. Power in AC Circuits Figure 14-7. The relationship of power, current, and voltage in a resistive AC circuit.

  11. Summary • A basic AC circuit consists of an AC source, conductors, and a resistive load • The voltage and current are in phase in a pure resistive circuit • The effective value of AC current or voltage produces the same results as the equivalent DC voltage or current

  12. Summary (cont’d.) • Ohm’s law can be used with all effective values • AC voltage or current values are assumed to be the effective values if not otherwise specified

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