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Home ‣ Electrical Engineering ‣ Circuit Theorems and Conversions See What Others Are Saying!
  • Question

  • A practical current source has a finite internal resistance.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • More questions

    • 1. Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is

    • Options
    • A. 24 V
    • B. 12 V
    • C. 0 V
    • D. 6 V
      • Discuss
    • 2. An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

    • Options
    • A. VR ? VL
    • B. VL < VR
    • C. VL = VR
    • D. VL > VR
      • Discuss
    • 3. Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.


    • Options
    • A. 129∠21.4° Ω
    • B. 43.7∠68.6° Ω
    • C. 43.7∠21.4° Ω
    • D. 12.9∠68.6° Ω
      • Discuss
    • 4. In a Y-Y source/load configuration, the

    • Options
    • A. phase current, the line current, and the load current are all equal in each phase
    • B. phase current, the line current, and the load current are 120° out of phase
    • C. phase current and the line current are in phase, and both are 120° out of phase with the load current
    • D. line current and the load current are in phase, and both are out of phase with the phase current
      • Discuss
    • 5. A certain Wheatstone bridge has the following resistor values: R1 = 10 kΩ, R2 = 720 Ω, and R4 = 2.4 kΩ. The unknown resistance is

    • Options
    • A. 24 Ω
    • B. 2.4 Ω
    • C. 300 Ω
    • D. 3,000 Ω
      • Discuss
    • 6. A certain voltage source has the values VS = 30 V and RS = 6 Ω. The values for an equivalent current source are

    • Options
    • A. 5 A, 6 Ω
    • B. 30 A, 6 Ω
    • C. 5 A, 30 Ω
    • D. 30 A, 5 Ω
      • Discuss
    • 7. Find the current in R2 of the given circuit, using the superposition theorem.


    • Options
    • A. 16.7 mA
    • B. 33.3 mA
    • C. 50 mA
    • D. 16.6 mA
      • Discuss
    • 8. Find the Thevenin equivalent (VTH and RTH) between terminals A and B of the circuit given below.


    • Options
    • A. 4.16 V, 120 Ω
    • B. 41.6 V, 120 Ω
    • C. 4.16 V, 70 Ω
    • D. 41.67 V, 70 Ω
      • Discuss
    • 9. The turns ratio required to match an 80 Ω source to a 320 Ω load is

    • Options
    • A. 80
    • B. 20
    • C. 4
    • D. 2
      • Discuss
    • 10. Which of the following power factors results in less energy loss in an RL circuit?

    • Options
    • A. 1
    • B. 0.8
    • C. 0.4
    • D. 0.2
      • Discuss

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