logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics ‣ Capacitors Comments
  • Question

  • You could increase the time constant of an RC circuit by


  • Options
  • A. adding a resistor in parallel with the circuit resistance
  • B. adding a capacitor in parallel with the circuit capacitance
  • C. increasing the amplitude of the input voltage
  • D. exchanging the position of the resistor and capacitor in the circuit

  • Correct Answer
  • adding a capacitor in parallel with the circuit capacitance 

    • Capacitors problems

    Search Results

    • 1. If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?

    • Options
    • A. 10 Ω
    • B. 100 Ω
    • C. 1 k Ω
    • D. 1 M Ω
      • Discuss
    • 2. A capacitor's rate of charge is considered:

    • Options
    • A. magnetic
    • B. a current block
    • C. linear
    • D. exponential
      • Discuss
    • 3. 

      What is the reactive power in the given circuit?


    • Options
    • A. 0 VAR
    • B. 691 µVAR
    • C. 44.23 mVAR
    • D. 1.45 kVAR
      • Discuss
    • 4. A capacitor is constructed of two parallel:

    • Options
    • A. conductors
    • B. semiconductors
    • C. inductors
    • D. dielectrics
      • Discuss
    • 5. Capacitive reactance values connected in series offer

    • Options
    • A. an increase in total XC
    • B. a decrease in total XC
    • C. no change in total XC
    • D. total opposition to voltage in the circuit
      • Discuss
    • 6. 

      What is the capacitance of the circuit shown in the given circuit?


    • Options
    • A. 0.066 µF
    • B. 0.9 µF
    • C. 65.97 pF
    • D. 900 pF
      • Discuss
    • 7. In an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?

    • Options
    • A. bandpass
    • B. low-pass
    • C. high-pass
    • D. band-stop
      • Discuss
    • 8. In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:

    • Options
    • A. 45 V
    • B. 50 V
    • C. 55 V
    • D. 60 V
      • Discuss
    • 9. What is the dielectric constant for ceramic?

    • Options
    • A. between 6 and 8000
    • B. 5.0
    • C. between 5 and 1000
    • D. 3000
      • Discuss
    • 10. If the reactive power of a circuit is 50 mW while the apparent power is 64 mW, then what is the true power of the circuit?

    • Options
    • A. 14 mW
    • B. 36 mW
    • C. 40 mW
    • D. 114 mW
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.