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Electric Circuits

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

 10 A.
 8 A.
 12 A.
 6 A.

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Electric Circuits
In above question, if circuit efficiency is 90 %. What will be output power ?

  40 kW.
  35.6 kW.
  30 kW.
  37.3 kW.

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Electric Circuits
In RLC parallel circuit circuit current through inductor is more than current through capacitor. Then what is the power factor of the circuit?

 zero
 unity
 leading
 lagging

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Electric Circuits
In RLC parallel network R = 2 Ohm, L = 2mH and C = 1μF. Find the value of time constant?

 2 msec
 4 msec
 2 μsec
 4 μsec

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Electric Circuits
If the sheet of a backelite is inserted between the plates of an air capacitor, the capacitance will

 increase.
 becomes zero.
 decrease.
 remains unchanged.

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Electric Circuits
A series RLC circuit is connected across a 240V, 50 Hz supply. When the voltage across capacitor is 250V, a maximum current of 0.5A flows in the circuit. Find the inductance.

 1.58 µF.
 6.37 µF.
 0.47 µF.
 2.25 µF.

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