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Electric Circuits

Electric Circuits
The phase angle difference between current and voltage is 90o, the power will be

 minimum.
 zero.
 maximum.
 VI.

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Electric Circuits
Silver coating is provided for

  bearing surfaces.
  decorative purpose.
  protective purpose.
  all of above.

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Electric Circuits
The current in a chemical cell is a movement of

  positive ions only.
  negative ions only.
 positive hole charges.
  positive and negative ions.

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

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Electric Circuits
If a capacitors of capacitance 100 μF is connected across a voltage source of 10 V, then what will be the energy stored in that capacitor?

 5 × 10 - 3 Joule.
 10 × 10 - 3 Joule.
 10 × 10 6 Joule.
 5 × 10 - 2 Joule.

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Electric Circuits
What is the reactive power in AC operation?

 Real power × sinθ.
 Real power × cosθ.
 Apparent power × cosθ.
 Apparent power × sinθ.

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