AEEAC 25019 Electrical Theory-AC Circuits

 

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Topic 1: Alternating Current

1.1  Explain the difference between direct current and alternating
current.

1.2  Explain how current flow and polarity change in AC circuits.

1.3  Describe how a sine wave can represent AC voltage.

1.4  Explain what frequency is and how it is measured.

1.5  Define the following terms: peak value, peak-to-peak
value, and effective value.

 

Topic 2: Inductance

2.1 Define “inductance” and “inductive reactance.”

2.2 Explain how inductive reactance limits current flow.

2.3 Explain how the amount of inductive reactance in a
      circuit can be increased.

2.4 Describe the effects of inductance on current and voltage.

 

Topic 3: Capacitance

3.1 Define the following terms: capacitance and capacitive
      reactance.

3.2 Describe how a capacitor is charged.

3.3 Describe the effects of capacitance on current and voltage.

 

Topic 4: AC Power

4.1 Define the following terms: true power, reactive power,
      and apparent power.

4.2 Describe how power factor is used in calculating true
      power in AC circuits.

4.3 Explain how a three-wire single-phase AC system supplies
      two different voltages.

4.4 Identify delta-connected and wye-connected three-phase
      AC systems.

 

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