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What dielectric is generally employed by a variable capacitor?

A. Mica

B. Air

C. Electrolyte

D. Ceramic

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  1. An inductive load always has a ___ power factor
  2. For a series circuita the higher the quality factor
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    Any resistance R in a branch of a network in which a current I is flowing can be replaced by a voltage equal to IR. This states
  4. Which of the following has a positive temperature coefficient?
  5. An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
  6. Which of the following is a way of decreasing mutual inductance?
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    Which of the following is the statement of Ohms law?
  8. What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
  9. The internal resistance of an ideal current source is
  10. Refers specifically to steady state values of quantities in ac circuits which are complex numbers.
  11. Barium-strontium titanite dielectric material is also called
  12. What is the specific resistance of a pure germanium?
  13. Electric energy refers to
  14. Points to be considered in choosing a capacitor
  15. Which of the following dielectric materials makes the lowest-capacitance capacitor?
  16. With double the number of turns by the same length and areaa the inductance is
  17. If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will
  18. It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
  19. The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
  20. If three 100-pF capacitors are connected in seriesa then the total capacitance is
  21. The farad is not equivalent to which of the following combination of units
  22. When two in-phase sine waves that have identical frequency and amplitude are added togethera then the…
  23. For greater accuracya the value of phase angle should be determined from
  24. Two complex numbers or phasors are said to be conjugate if they
  25. Which of the following is the peakiest?
  26. A rheostat is a form of
  27. In the 5-band method of capacitor color codinga the first band indicates
  28. An intermittent and non-symmetrical alternating current like that obtained from the secondary winding…
  29. Which of the following describes the action of a capacitor?
  30. What is the specific resistance of a pure silicon?