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Electric Circuits

Electric Circuits
Active filter consists of

 op-amp and capacitor.
 inductor.
 op-amp.
 capacitor.

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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.

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

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Electric Circuits
The power dissipated in a pure capacitor is

 both (B) and (C) above.
 proportional to applied voltage.
 zero.
 proportional to the value of capacitance.

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

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

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Electric Circuits
A wire 2.5 m long is bent into a square. An current of 100 A flowing through the wire will produce a magnetizing force at the center of the square, equal to

 196 AT / m.
 144 AT / m.
 72 AT / m.
 222 AT / m.

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Electric Circuits
Time constant of RC series circuit is

 RC
 2RC
 2L/R
 L/R

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MORE MCQ ON Electric Circuits

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