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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?

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

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AC Fundamentals, Circuit and Circuit Theory
In a series L-C circuit at the resonant frequency the

Voltage across C is minimum
Impedance is maximum
Current is minimum
Current is maximum

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AC Fundamentals, Circuit and Circuit Theory
In a loss-free R-L-C circuit the transient current is

Sinusoidal
Oscillating
Non-oscillating
Square wave

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AC Fundamentals, Circuit and Circuit Theory
Form factor for a sine wave is

1.11
1.414
0.637
0.707

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

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

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

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