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Electric Circuits

Electric Circuits
The efficiency in case of maximum power transfer theorem is

 50 % - 100 %.
 less than 50 %.
 50 %.
 100 %.

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

 lagging
 zero
 leading
 unity

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Electric Circuits
A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

 63.7 Ω.
 135.86 Ω.
 0.015 Ω.
 1.765 Ω.

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Electric Circuits
In a lead acid cell PbSO4 formed during

  discharging only.
  charging only.
  neither during charging nor discharging.
  both during charging as well as discharging.

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Electric Circuits
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF.

 0.01C and 5W.
 0.01C, 10MW.
 0.1C, 100MW.
 0.1C, 10MW.

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Electric Circuits
Constant K type HPF (high pass filter) having cut off frequency 12 KHz and nominal impedance Ro = 500 Ω Find shunt arm inductor L and series arm capacitance C for T and π section of HPF ?

 L = 0.0132 mH, C = 0.0132 μF.
 L = 3.316 mH, C = 132 μF.
 None of these.
 L = 3.316 mH, C = 0.0132 μF.

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