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  • Question

  • The complex number 6 + j6 is equivalent to


  • Options
  • A. 6∠45°
  • B. 36∠45°
  • C. 8.48∠45°
  • D. 8.48∠90°

  • Correct Answer
  • 8.48∠45° 

    • RC Circuits problems

    Search Results

    • 1. The complex number 40∠ 55° is equivalent to

    • Options
    • A. 55 + j55
    • B. 40 + j40
    • C. 45.88 + j65.52
    • D. 22.94 + j32.76
      • Discuss
    • 2. In the complex plane, the number 14 ? j5 is located in the

    • Options
    • A. first quadrant
    • B. second quadrant
    • C. third quadrant
    • D. fourth quadrant
      • Discuss
    • 3. A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is

    • Options
    • A. Z = 47 Ω + j150 Ω
    • B. Z = 47 Ω ? j150 Ω
    • C. Z = 197 Ω
    • D. Z = 103 Ω
      • Discuss
    • 4. An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

    • Options
    • A. good
    • B. open
    • C. shorted
    • D. partly shorted
      • Discuss
    • 5. An inductance of 0.08 µH is larger than

    • Options
    • A. 0.0000008 H
    • B. 0.000000008 H
    • C. 0.000008 H
    • D. 0.00008 mH
      • Discuss
    • 6. A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?

    • Options
    • A. 129 Ω
    • B. 12.9 Ω
    • C. 167 Ω
    • D. 73 Ω
      • Discuss
    • 7. For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is

    • Options
    • A. 19.52 W
    • B. 195.2 W
    • C. 275 W
    • D. 25 W
      • Discuss
    • 8. A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is

    • Options
    • A. 0 Hz
    • B. 12 kHz
    • C. 6 kHz
    • D. 18 kHz
      • Discuss
    • 9. What is the angular difference between +j4 and ?j4?

    • Options
    • A. 30°
    • B. 90°
    • C. 180°
    • D. 270°
      • Discuss
    • 10. A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is

    • Options
    • A. 9.2 mA
    • B. 92 mA
    • C. 4.6 mA
    • D. 460 mA
      • Discuss

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