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Electric Circuits

Electric Circuits
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be

 160 µF
 40 µF
 10 µF
 5 µF

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Electric Circuits
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of heater will

  none of these.
  decrease.
  increase.
  remain constant.

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Electric Circuits
During charging, the electrolyte of a lead acid battery becomes

 diluted with water.
 weaker.
 there is no change in electrolyte.
 stronger.

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

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

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 1.
 0.5.
 0.577.
 0.866.

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Electric Circuits
The delta equation of given star connected impedance ZQR is equal to

 (5 + j10 / 3) Ω.
 40 Ω.
 (20 + j10) Ω.
  (10 + j30) Ω.

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