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AC Fundamentals, Circuit and Circuit Theory

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

Instantaneous power
Reactive power
True power
Volt-amperes

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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?

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

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AC Fundamentals, Circuit and Circuit Theory
Power factor of the following circuit will be unity

Resistance
Capacitance
None of the listed here
Inductance

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AC Fundamentals, Circuit and Circuit Theory
The inductance of a coil can be increased by

Increasing core length
Decreasing the diameter of the former
Choosing core material having high relative permeability
Decreasing the number of turns

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AC Fundamentals, Circuit and Circuit Theory
In a highly capacitive circuit the

Reactive power is more than the actual power
Actual power is more than its reactive power
Reactive power is more than the apparent power
Apparent power is equal to the actual power

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AC Fundamentals, Circuit and Circuit Theory
At very low frequencies a series R-C circuit behaves as almost purely

Inductive
Resistive
None of the listed here
Capacitive

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