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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. If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of…
  2. Which of the following capacitors are used only in dc circuits?
  3. What is the most convenient way of achieving large capacitance?
  4. Two complex numbers or phasors are said to be conjugate if they
  5. The reactance curve is a plot of frequency versus _____ for a series RLCcircuit
  6. If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will
  7. The presence of an electric current is made known by
  8. Which of the following materials has the lowest dielectric strength?
  9. The arc across a switch when it open an RL circuit is a result of the
  10. Which of the following is a preferred resistor value?
  11. Points to be considered in choosing a capacitor
  12. What is the temperature coefficient of the resistance Eureka?
  13. What is the total resistance of a two equal valued resistors in series?
  14. The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera…
  15. The charge in the capacitor is stored at the
  16. In a rectangular wavea the peak factor is
  17. Which of the following dielectric materials makes the lowest-capacitance capacitor?
  18. The temperature coefficient of resistance of electrolytes is
  19. Which of the following does not refer to electrical energy?
  20. For a series ACcircuita ___ is not used as a reference phasor.
  21. What is the specific resistance of a pure silicon?
  22. Which of the following is a disadvantage of a wire-wound resistor?
  23. If resonant frequency is 10 kHz and quality factor is 50a then
  24. Property of an electric circuit that dissipates electric energy
  25. Rationalizing the denominator of a complex number means
  26. What increases the resistance of wire at high frequencies?
  27. Refers specifically to steady state values of quantities in ac circuits which are complex numbers.
  28. The voltage cannot be exactly in phase with the current in a circuit that contains
  29. The rms value of a triangular or sawtooth waveform is ___ tim value.
  30. In an inductive coila the rate of rise of current is maximum