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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a purely inductive circuit

Actual power is zero
Apparent power is zero
Reactive power is zero
None of the listed here

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of pure cosine function is

Same as peak value
0.707 of peak value
Zero
0.5 of peak value

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AC Fundamentals, Circuit and Circuit Theory
A parallel AC. circuit in resonance will

Have a high voltage developed across each inductive and capacitive section
Have current in each section equal to the line current
Act like a resistor of low value
Have a high impedance

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

The current leads the voltage by 90°
The current is in phase with the voltage
The current lags behind the voltage by 90°
The current can lead or lag by 90°

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AC Fundamentals, Circuit and Circuit Theory
Pure inductive circuit takes power from the A.C. line when

Both applied voltage and current decrease
Applied voltage decreases but current increases
Applied voltage increases but current decreases
Both applied voltage and current increase

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AC Fundamentals, Circuit and Circuit Theory
The product of apparent power and cosine of the phase angle between circuit voltage and current is

True power
Reactive power
Volt-amperes
Instantaneous power

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MORE MCQ ON AC Fundamentals, Circuit and Circuit Theory

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