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Home ‣ Electrical Engineering ‣ Three-Phase Systems in Power Applications See What Others Are Saying!
  • Question

  • Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by


  • Options
  • A. certain constant phase angles
  • B. certain constant frequencies
  • C. certain constant voltages
  • D. certain constant currents

  • Correct Answer
  • certain constant phase angles 

    • More questions

    • 1. In the complex plane, the number 4 + j3 is located in the

    • Options
    • A. first quadrant
    • B. second quadrant
    • C. third quadrant
    • D. fourth quadrant
      • Discuss
    • 2. The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?

    • Options
    • A. 1 MΩ
    • B. 24 kΩ
    • C. 18 kΩ
    • D. 12 kΩ
      • Discuss
    • 4. In a series RLC circuit, the larger reactance determines the net reactance of the circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?

    • Options
    • A. 219 kΩ
    • B. 66 kΩ
    • C. 660 kΩ
    • D. 1.3 MΩ
      • Discuss
    • 6. When one of three series resistors is removed from a circuit and the circuit is reconnected, the current

    • Options
    • A. increases
    • B. increases by one-third
    • C. decreases by one-third
    • D. decreases by the amount of current through the removed resistor
      • Discuss
    • 7. Find the Norton circuit, that is, IIN and RN, for the circuit given below.


    • Options
    • A. 478 mA, 12.8 Ω
    • B. 750 mA, 12.8 Ω
    • C. 478 mA, 6.8 Ω
    • D. 750 mA, 6.8 Ω
      • Discuss
    • 8. If in a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage?

    • Options
    • A. 0 V
    • B. 90 V
    • C. 156 V
    • D. 180 V
      • Discuss
    • 9. Addition of resistors in parallel increases total resistance and decreases total current.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Determine IN for the circuit consisting of VS, R1, R2, and R3 shown in the given circuit.


    • Options
    • A. 676 mA
    • B. 245 mA
    • C. 431 mA
    • D. 75 mA
      • Discuss

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