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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In the case of an unsymmetrical alternating current the average value must always be taken over

Unsymmetrical part of the wave form
The whole cycle
The quarter cycle
The half cycle

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees.

90
60
45
30

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AC Fundamentals, Circuit and Circuit Theory
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will

Be reduced to one fourth
Be reduced by half
Be doubled
Be four times as high

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AC Fundamentals, Circuit and Circuit Theory
When an alternating current passes through an ohmic resistance the electrical power converted into heat is

None of the listed here
Active power
Apparent power
Reactive power

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

Auto transformers
Transformers
Electronic equipment
Current transformers

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AC Fundamentals, Circuit and Circuit Theory
In a pure resistive circuit

None of the listed here
Current can lead or lag the voltage by 90°
Current lags behind the voltage by 90°
Current is in phase with the voltage

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