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Electric Circuits

Electric Circuits
In RLC parallel circuit if current through capacitor and inductor is equal. Then What is the power factor?

 leading
 zero
 lagging
 unity

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Electric Circuits
An ideal constant voltage source has _______________ internal impedance whereas a constant current source has ____________ internal impedance.

 infinite, infinite
 zero, zero
 infinite, zero
 zero, infinite

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Electric Circuits
In the circuit shown in the figure, the value of Vs is 0, when I = 4 A. The value of I, when Vs = 16 V, is

 6 A.
 12 A.
 8 A.
 10 A.

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Electric Circuits
In series RLC circuit what is the power factor just above the resonance frequency?

 Unity
 Zero
 Leading
 Lagging

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Electric Circuits
Aluminium is produced from bauxite by

  froth flotation.
  oxidation.
  electrolytic process.
  rotating.

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Electric Circuits
Which of following capacitors has relatively shorter shelf life?

 Glass.
 both (B) and (C) above.
 Paper.
 Electrolytic.

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