logo

CuriousTab

CuriousTab

Discussion


Home Electrical Engineering Circuit Theorems in AC Analysis See What Others Are Saying!
  • Question
  • Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.

    Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 k?. 1488??70.7° ?


  • Options
  • A. 1488∠?70.7° Ω
  • B. 3859 ∠?31.2° Ω
  • C. 5180 ∠?50.5° Ω
  • D. 1828∠?50.2° Ω

  • Correct Answer
  • 1828∠?50.2° Ω 


  • More questions

    • 1. A 470 Ω resistor and a coil with 125 Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is

    • Options
    • A. 152 mA
    • B. 32 mA
    • C. 12 mA
    • D. 120 mA
    • Discuss
    • 2. The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 Ω. The voltage across the load is

    • Options
    • A. 0 V
    • B. 6 V
    • C. 18 V
    • D. 2 V
    • Discuss
    • 3. A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than

    • Options
    • A. 2 µF
    • B. 4 µF
    • C. 10 µF
    • D. 1.5 µF
    • Discuss
    • 4. What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?

    • Options
    • A. 1.8 V
    • B. 18 V
    • C. 7.2 V
    • D. 72 V
    • Discuss
    • 5. If there is 6 A of current through the filament of a lamp, how many coulombs of charge move through the filament in 1.75 s?

    • Options
    • A. 10.5 C
    • B. 105 C
    • C. 3.4 C
    • D. 34 C
    • Discuss
    • 6. A phasor represents

    • Options
    • A. the magnitude and a quantity direction
    • B. the width of a quantity
    • C. the phase angle
    • D. the magnitude of a quantity
    • Discuss
    • 7. The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency

    • Options
    • A. must be increased
    • B. must be decreased
    • C. is held constant
    • D. has no effect
    • Discuss
    • 8. A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?

    • Options
    • A. 5.14 MHz
    • B. 514 kHz
    • C. 5.03 MHz
    • D. 503 kHz
    • Discuss
    • 9. The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is

    • Options
    • A. 1 A
    • B. 7 A
    • C. unknown
    • D. the larger of the two
    • Discuss
    • 10. Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is

    • Options
    • A. 12.5 Ω
    • B. 200 Ω
    • C. 20 KΩ
    • D. 50 Ω
    • Discuss


    Comments

    There are no comments.

Enter a new Comment