Home

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

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. What is the peak factor of a triangular wave?
  2. If three 9 mH inductors are connected in parallel without mutual inductance then the total i nductance…
  3. A real current source has
  4. In an inductive coila the rate of rise of current is maximum
  5. Why are inductance and capacitance not relevant in a dc circuit?
  6. A series RLCcircuit has a ______ power factor at its half-power points
  7. When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
  8. A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor…
  9. What dielectric is generally employed by a variable capacitor?
  10. What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?
  11. The distance between the capacitor plates increases two timesa then its capacitance
  12. At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?
  13. In dividing or multiplying phasor quantitiesa ___ form is used.
  14. Which of the following does not affect resistance?
  15. At what frequency will the current in a series RLCcircuit reach its maximum value for an applied voltage…
  16. Nortons theorem is what form of an ac equivalent circuit?
  17. If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will
  18. The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase…
  19. Which of the following is a way of decreasing mutual inductance?
  20. The reason why electrical appliances are not connected in series.
  21. Which of the following conditions is not true for a series RLCcircuit at resonance?
  22. The capacitance of a capacitor is ___ relative permittivity.
  23. In an ac circuit with XL and R in seriesa the
  24. A capacitive load always has a ______ power facto
  25. Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature…
  26. The ratio of the flux density to the electric field intensity in the dielectric is called
  27. In a series RLCcircuit
  28. Which of the following does not refer to electrical energy?
  29. A capacitance of 6 F means
  30. Which of the following dielectric materials makes the highest-capacitance capacitor?