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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In an AC. circuit, a low value of kVAR compared with kW indicates

Low efficiency
Maximum load current
High power factor
Unity power factor

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AC Fundamentals, Circuit and Circuit Theory
Power factor of the system is kept high

To maximize the utilization of the capacities of generators, lines and transformers
All of the listed here
To reduce line losses
To reduce voltage regulation of the line

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AC Fundamentals, Circuit and Circuit Theory
The power is measured in terms of decibels in case of

Transformers
Current transformers
Electronic equipment
Auto transformers

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AC Fundamentals, Circuit and Circuit Theory
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?

220 v3 V
220/v3 V
220 V
None of these

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AC Fundamentals, Circuit and Circuit Theory
Power factor of an inductive circuit is usually improved by connecting capacitor to it in

None of the listed here
Both parallel and series
Series
Parallel

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AC Fundamentals, Circuit and Circuit Theory
The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?

VC and VR
None of these
VC and VL
VL and VR

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