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A trimmer is a variable capacitor in which capacitance is varied by changing the

A. Number of plates

B. Dielectric

C. Distance between plates

D. Plate area

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  1. A capacitive load always has a ______ power facto
  2. The temperature-resistance coefficient of pure gold is
  3. The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
  4. The distance between the capacitor plates increases two timesa then its capacitance
  5. What is the time constant for L of 240 mH in series with R of 20 ?
  6. For series capacitorsa total charge is
  7. What is the total capacitance of 10 capacitorsa each of 20 F in series?
  8. High resistance values are a consequence of the ___ of the film.
  9. In dividing or multiplying phasor quantitiesa ___ form is used.
  10. The factor 0.707for converting peak to rms applies only to
  11. The symbol Q refers to
  12. Which of the following has negative temperature coefficient?
  13. A capacitor requires 12 C of charge to raise its potential of 3 V. What is the capacitance of the capacitor?
  14. Which of the following is a preferred resistor value?
  15. Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
  16. If a capacitor is rated for 200V dca what is its effective ac working voltage?
  17. An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive…
  18. Inductive reactance applies only to sine waves because it
  19. A trigger circuit consisting of a capacitor of 0.01 F is connected in series with a resistor. If the…
  20. What refers to such work at very low temperaturesa near absolute zero?
  21. In calculating maximum instantaneous power ___ voltage or current is used.
  22. What theorem is generally used in the analysis of vacuum tubes?
  23. When the net reactance in a series coil-capacitor circuit is zero at frequency fa the nature of its…
  24. In a series RLCcircuit
  25. For parallel capacitorsa total charge is
  26. According to Gauss theorema flux can be equated to
  27. In a series circuit with unequal resistances the
  28. The unit of elastance is
  29. For a triangular and sawtooth waveform the rms voltage or current equals
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    Nortons theorem is ____ Thevenins theorem.