AC Fundamentals, Circuit and Circuit Theory
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to

The size of the capacitor being quite big
The current flowing in capacitor
The statement is incorrect
The capacitive reactance in ohms

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AC Fundamentals, Circuit and Circuit Theory
The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

Both waves must have zero value at the same time
None of the listed here
Both waves must have identical peak values
Both waves must have same frequency

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AC Fundamentals, Circuit and Circuit Theory
The frequency of an alternating current is

The number of waves passing through a point in one second
The speed with which the alternator runs
The number of electrons passing through a point in one second
The number of cycles generated in one minute

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AC Fundamentals, Circuit and Circuit Theory
A phasor is

A line which represents the magnitude and phase of an alternating quantity
An instrument used for measuring phases of an unbalanced 3-phase load
A line representing the magnitude and direction of an alternating quantity
A colored tag or band for distinction between different phases of a 3-phase supply

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