Which of the following has a positive temperature coefficient?

A. Mica

B. Manganin

C. Silicon

D. Carbon

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  1. An open resistor when checked with an ohmmeter reads
  2. A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance…
  3. In the 5-band method of capacitor color codinga the first band indicates
  4. Which of the following is the most popular waveform?
  5. A capacitor requires 12 C of charge to raise its potential of 3 V. What is the capacitance of the capacitor?
  6. An intermittent and non-symmetrical alternating current like that obtained from the secondary winding…
  7. What maximum voltage can be applied across the capacitor of time?
  8. The reactance curve is a plot of frequency versus _____ for a series RLCcircuit
  9. The mutual inductance between two coils is ___ the reluctance of magnetic path.
  10. A capacitive load always has a ______ power facto
  11. The ratio between the active power and the apparent power of a load in an ac circuit is called
  12. The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which…
  13. In a rectangular wavea the peak factor is
  14. In a series RLCcircuit
  15. Which of the following is the peakiest?
  16. It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
  17. Which of the following is a common material used in wire-wound resistors?
  18. Series resonant circuit is sometimes known as
  19. The wavelength of an alternating waveform depends upon the ___ of the variation.
  20. Why are inductance and capacitance not relevant in a dc circuit?
  21. What determines the direction of induced emf in a conductor or coil?
  22. A factor that states how much the resistance changes for a change in temperature?
  23. What refers to the lowest voltage across any insulator that can cause current flow?
  24. A trigger circuit consisting of a capacitor of 0.01 F is connected in series with a resistor. If the…
  25. Metal tin becomes superconductor at approximately
  26. The ohmic value of a resistor with negative temperature coefficient
  27. What is a closed path made of several branches of the network called?
  28. Nortons theorem is ____ Thevenins theorem.
  29. A trimmer is a variable capacitor in which capacitance is varied by changing the
  30. In a rectangular wavea the form factor is