| 31. |
The total power factor is greater than the displacement power factor,
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Answer:
Option (b) |
| 32. |
__________ is the RMS reduction in the AC voltage at power frequency from half of a cycle to a few seconds’ duration.
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Answer:
Option (c) |
| 33. |
Electrical transient characterized by a sharp increase in voltage or current is called as
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Answer:
Option (b) |
| 34. |
__________ is the RMS increase in AC voltage at power frequency from half of a cycle to a few seconds’ duration
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Answer:
Option (a) |
| 35. |
Subcycle disturbance in the AC waveform evidenced by a sharp, brief discontinuity of the waveform is known as ______________
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Answer:
Option (d) |
| 36. |
The primary characteristics that define a transient are
(i) peak amplitude
(ii) rise time
(iii) fall time
(iv) frequency of oscillation
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Answer:
Option (d) |
| 37. |
______________ are low-frequency phenomena that result in voltage sags or swells.
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Answer:
Option (a) |
| 38. |
_______________ are fast, short-duration events that produce distortions such as notching, ringing, and impulse.
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Answer:
Option (b) |
| 39. |
Grounding is done
(i) for safety
(ii) to provide a low-impedance path for the flow of fault current in case of a ground fault
(iii) to create a ground reference plane for sensitive electrical equipment
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Answer:
Option (d) |
| 40. |
_________________ refers to the interaction between electric and magnetic fields and sensitive electronic circuits and devices.
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Answer:
Option (c) |