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Home Electrical Engineering Three-Phase Systems in Power Applications See What Others Are Saying!
  • Question
  • A three-phase generator is connected to three 90 Ω load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?


  • Options
  • A. 0 A
  • B. 1.33 A
  • C. 3.99 A
  • D. 2.66 A

  • Correct Answer
  • 0 A 


  • More questions

    • 1. If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is

    • Options
    • A. 220 kΩ
    • B. 22 kΩ
    • C. 2.2 kΩ
    • D. 220 Ω
    • Discuss
    • 2. When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is

    • Options
    • A. 14.4 V
    • B. 1.4 V
    • C. 100 V
    • D. 10 V
    • Discuss
    • 3. A 12 kΩ resistor is in series with a 90 mH coil across an 8 kHz ac source. Current flow in the circuit, expressed in polar form, is I = 0.3∠0° mA. The source voltage, expressed in polar form, is

    • Options
    • A. 3.84∠20.6° V
    • B. 12.8∠20.6° V
    • C. 0.3∠20.6° V
    • D. 13.84∠69.4° V
    • Discuss
    • 4. A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

    • Options
    • A. increase
    • B. decrease
    • C. remain constant
    • D. be excessive
    • Discuss
    • 5. A 140 Ω resistor is in parallel with an inductor having 60 Ω inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is

    • Options
    • A. 5.51 Ω
    • B. 55.15 Ω
    • C. 90 Ω
    • D. 200 Ω
    • Discuss
    • 6. When converting 1,600 kilohms to megohms, the result is

    • Options
    • A. 1,600,000 MΩ
    • B. 160 MΩ
    • C. 1.6 MΩ
    • D. 0.160 MΩ
    • Discuss
    • 7. The node voltage method is based on Kirchhoff's voltage law.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is

    • Options
    • A. 15 mA
    • B. 1.5 mA
    • C. 10 mA
    • D. 1 mA
    • Discuss
    • 9. Referring to Problem 8, assume the input voltage is 15 V ac. What is the output voltage at the critical frequency,fc?

    • Options
    • A. 0 V
    • B. 7.07 V
    • C. 15 V
    • D. 10.6 V
    • Discuss
    • 10. A certain series RLC circuit with a 200 Hz, 15 V ac source has the following values: R = 12 Ω, C = 80 µF, and L = 10 mH. The total impedance, expressed in polar form, is

    • Options
    • A. 12.28∠12.34° Ω
    • B. 12.57∠12.34° Ω
    • C. 9.95∠12.34° Ω
    • D. 12.62∠12.34° Ω
    • Discuss


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