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Which of the following has negative temperature coefficient?

A. Carbon

B. Nickel

C. Brass

D. Constantan

You can do it
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    A capacitance of 6 F means
  2. If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of…
  3. A series RLCcircuit has a ______ power factor at its half-power points
  4. What is the complex impedance of a circuit with an absolute resistance of 300 ?
  5. When frequency of an ac wave decreasesa the value of XLin a coil
  6. What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?
  7. As applied to a series RLCcircuita bandwidth means
  8. What is the time constant for L of 240 mH in series with R of 20 ?
  9. At what frequency will the current in a series RLCcircuit reach its maximum value for an applied voltage…
  10. An intermittent and non-symmetrical alternating current like that obtained from the secondary winding…
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    Which of the following is the statement of Ohms law?
  12. In an ac circuit with a resistive branch and an inductive branch in parallela the
  13. The maximum power transfer theorem is used in
  14. What determines the direction of induced emf in a conductor or coil?
  15. In a series RLCcircuit
  16. It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
  17. The ratio between the reactive power and the apparent power of an ac load is called
  18. What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?
  19. If two complex conjugates are addeda ___ components results.
  20. In a circuita an active element is one which
  21. What is the efficiency under the conditions of maximum power transfer?
  22. In a series RLCcircuit
  23. Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature…
  24. Capacitance increase with
  25. Which of the following is the peakiest?
  26. A neon glow lamp used as a night light ionizes at approximately
  27. In an inductive coila the rate of rise of current is maximum
  28. A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor…
  29. Parallel resonant circuit is sometimes called as
  30. The Q-factor of a parallel resonant circuit is also known as