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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

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

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

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

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AC Fundamentals, Circuit and Circuit Theory
Ohm is unit of all of the following except

Resistance
Inductive reactance
Capacitance
Capacitive reactance

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AC Fundamentals, Circuit and Circuit Theory
The square waveform of current has following relation between r.m.s. value and average value.

r.m.s. value of current is greater than average value
r.m.s. value is equal to average value
r.m.s. value of current is less than average value
None of these

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AC Fundamentals, Circuit and Circuit Theory
The form factor is the ratio of

r.m.s. value to average value
Average value to r.m.s. value
Peak value to r.m.s. value
None of these

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

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

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