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Home Electrical Engineering Circuit Theorems in AC Analysis See What Others Are Saying!
  • Question
  • Determine VTH if R1 is changed to 3.3 kΩ.

    Determine VTH if R1 is changed to 3.3 k?. 0.574?16.7° V 4.63?16.7° V 4.63?39.5° V 0.463?39.5° V


  • Options
  • A. 0.574∠16.7° V
  • B. 4.63∠16.7° V
  • C. 4.63∠39.5° V
  • D. 0.463∠39.5° V

  • Correct Answer
  • 4.63∠39.5° V 


  • More questions

    • 1. Norton's theorem gives

    • Options
    • A. an equivalent current source in parallel with an equivalent impedance
    • B. an equivalent current source in series with an equivalent impedance
    • C. an equivalent voltage source in parallel with an equivalent impedance
    • D. an equivalent voltage source in series with an equivalent impedance
    • Discuss
    • 2. The total resistance of a series circuit is equal to the difference between the largest and smallest value resistors.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. A constant load power means a uniform conversion of

    • Options
    • A. mechanical to electrical energy
    • B. electrical to mechanical energy
    • C. current to voltage
    • D. voltage to current
    • Discuss
    • 4. The formula to find I when the values of V and R are known is

    • Options
    • A. I = VR
    • B. I = R/V
    • C. V = IR
    • D. I = V/R
    • Discuss
    • 5. If the RC time constant of an integrator is increased, as the time constant is increased

    • Options
    • A. the capacitor charges more during a pulse and discharges less between pulses
    • B. the capacitor charges less during a pulse and discharges more between pulses
    • C. the capacitor charges more during a pulse and discharges more between pulses
    • D. the capacitor charges less during a pulse and discharges less between pulses
    • Discuss
    • 6. The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is

    • Options
    • A. 20,000 Ω
    • B. 100,000 Ω
    • C. 200,000 Ω
    • D. 1,000,000 Ω
    • Discuss
    • 7. Three lights are connected in parallel across a 120 volt source. If one light burns out,

    • Options
    • A. the remaining two will glow dimmer
    • B. the remaining two will glow brighter
    • C. the remaining two will not light
    • D. the remaining two will glow with the same brightness as before
    • Discuss
    • 8. At series resonance, the inductive reactance and capacitive reactance are never equal.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. Referring to Problem 5, how long will it take the capacitor to discharge if the internal resistance of the pulse source is 100 Ω?

    • Options
    • A. 300 µs
    • B. 600 µs
    • C. 900 µs
    • D. 1.5 ms
    • Discuss
    • 10. When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

    • Options
    • A. decreases
    • B. increases
    • C. does not change
    • D. cannot be determined without values
    • Discuss


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