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Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is

A. Positive

B. Negative

C. Zero

D. Infinite

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  1. The hot resistance of an incandescent lamp is about ___ times its cold resistance.
  2. In a circuita a passive element is one which
  3. In a complex number 5 + j 10a 10 is called ___ part.
  4. A factor that states how much the resistance changes for a change in temperature?
  5. When resistance are connected in parallela the total resistance is
  6. When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater…
  7. The distance between the capacitor plates increases two timesa then its capacitance
  8. When the net reactance in a series coil-capacitor circuit is zero at frequency fa the nature of its…
  9. What is the efficiency under the conditions of maximum power transfer?
  10. For a series ACcircuita ___ is not used as a reference phasor.
  11. The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which…
  12. Which of the following is not a factor affecting capacitance oor?
  13. If two complex conjugates are addeda ___ components results.
  14. In liquids and gasesa ionization current results from a flow of
  15. Which of the following capacitors is suitable for dc filter circuits?
  16. Rationalizing the denominator of a complex number means
  17. Which of the following is the most popular waveform?
  18. In a rectangular wavea the peak factor is
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    In Nortons theorema the short circuit current is obtained by
  20. The reciprocal of a complex number is
  21. The farad is not equivalent to which of the following combination of units
  22. What is the form factor of a triangular wave?
  23. It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
  24. The second strip of an electronic resistor color-code represents
  25. Electron flow assumes charges flow from
  26. In an inductive coila the rate of rise of current is maximum
  27. What maximum voltage can be applied across the capacitor of time?
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    Which of the following is the statement of Ohms law?
  29. Capacitance increase with
  30. Parallel resonant circuit is sometimes called as