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Electric Circuits

Electric Circuits
Which of the following is the correct relation?

 all of these.
 AC-BD = 1.
 AB-CD = 1 .
 AD-BC = 1.

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Electric Circuits
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be

 R Ω
 8R Ω
 2R Ω
 4R Ω

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Electric Circuits
A 10Ω resistor is stretched to increase its length double. Its resistance will now be

 20 Ω.
 40 Ω.
 10 Ω.
 5 Ω.

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Electric Circuits
Electrolyte for silver plating is

  potassium nitrate solution.
  double cyanide of silver and potassium solution.
  dilute sulphuric acid.
  any of above.

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Electric Circuits
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

 DC only
 AC only
 Either AC or DC
 An Impulse

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Electric Circuits
In series RLC circuit what is the power factor just above the resonance frequency?

 Unity
 Zero
 Leading
 Lagging

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