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Which of the following has negative temperature coefficient?

A. Carbon

B. Nickel

C. Brass

D. Constantan

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  1. What theorem is usually used in the analysis of transistor circuit?
  2. Which of the following elements is active?
  3. For a linear circuita ___ voltage or current is used to calculate average power.
  4. In an inductive coila the rate of rise of current is maximum
  5. For a series ACcircuita ___ is not used as a reference phasor.
  6. The internal resistance of an ideal current source is
  7. Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature…
  8. What is the reciprocal of quality factor?
  9. Which of the following dielectric materials makes the highest-capacitance capacitor?
  10. What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
  11. What is a closed path made of several branches of the network called?
  12. If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will
  13. When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
  14. Another term for superconductor.
  15. For a triangular and sawtooth waveform the rms voltage or current equals
  16. Which of the following is a preferred resistor value?
  17. A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance…
  18. The maximum power transfer theorem is used in
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    An impedance given by 90 -45 is a/an ___ impedance.
  20. At what frequency will the current in a series RLCcircuit reach its maximum value for an applied voltage…
  21. What is the form factor of a triangular wave?
  22. Effects of capacitance
  23. What is the total capacitance of 10 capacitorsa each of 20 F in series?
  24. What is the other name of relative permittivity?
  25. For greater accuracya the value of phase angle should be determined from
  26. At parallel resonancea the currents flowing through L and C are
  27. Which of the following dielectric materials makes the lowest-capacitance capacitor?
  28. According to Gauss theorema flux can be equated to
  29. In calculating maximum instantaneous power ___ voltage or current is used.
  30. The symbol Q refers to