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Electric Circuits

Electric Circuits
The current in the resistor R shown in figure will be

 0.4 A.
 0.2 A.
 0.6 A.
 0.8 A.

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Electric Circuits
Under resonance condition the power factor of a system is

 unity
 lagging
 any of the above
 leading

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Electric Circuits
Energy efficiency during electroplating is usually in the range

 85 to 90%.
 90 to 99%.
 80 to 85%.
 50 to 80%.

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Electric Circuits
If two point charges are denoted by + Q and - Q and distance between this charges is d, then the dipole moment P equal to

  Q / d2.
  Q × d.
  Q2 × d.
  Q2 / d.

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Electric Circuits
The resistivity of the conductor depends on

 length of the conductor.
 none of these.
 type of material.
 area of the conductor.

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  n2 / R.
  nR .
  n2R.
  R / n2.

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