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Home ‣ Electrical Engineering ‣ Alternating Current and Voltage See What Others Are Saying!
  • Question

  • When a sine wave has a frequency of 100 Hz in 12 s it goes through


  • Options
  • A. 1/100 cycle
  • B. 12 cycles
  • C. 120 cycles
  • D. 1,200 cycles

  • Correct Answer
  • 1,200 cycles 

    • More questions

    • 1. The circuit phase angle is the angle between the total current and the applied (source) voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A capacitor of 2,000 pF is greater than

    • Options
    • A. 0.02 µF
    • B. 0.002 µF
    • C. 0.0002 µF
    • D. 0.0000002 F
      • Discuss
    • 4. When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

    • Options
    • A. 12 V
    • B. 120 V
    • C. 240 V
    • D. 2,400 V
      • Discuss
    • 5. Resistance is measured in

    • Options
    • A. henries
    • B. ohms
    • C. hertz
    • D. watts
      • Discuss
    • 6. What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 µWb?

    • Options
    • A. 6,000 µT
    • B. 600 µT
    • C. 600 T
    • D. 6 T
      • Discuss
    • 7. All the voltage drops and the source voltage added together in a series circuit is equal to

    • Options
    • A. the total of the voltage drops
    • B. the source voltage
    • C. zero
    • D. the total of the source voltage and the voltage drops
      • Discuss
    • 8. A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

    • Options
    • A. 1 MΩ
    • B. 100 kΩ
    • C. 1 kΩ
    • D. 330 Ω
      • Discuss
    • 9. A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will

    • Options
    • A. increase
    • B. remain the same
    • C. decrease
    • D. be less selective
      • Discuss
    • 10. The first row of a certain determinant has the numbers 3 and 5. The second row has the numbers 7 and 2. The value of this determinant is

    • Options
    • A. 31
    • B. ?31
    • C. 39
    • D. ?29
      • Discuss

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