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Electric Circuits

Electric Circuits
Which of the following is the correct relation?

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

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Electric Circuits
The inductive reactance of an electric circuit is 200 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 100 Ohms.
 50 Ohms.
 400 Ohms.
 200 Ohms.

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Electric Circuits
Highest current density is usually recommended for

  tin plating.
  bronze plating.
  cadmium plating.
  chromium plating.

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

 Zero
 Unity
 Lagging
 Leading

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Electric Circuits
Mesh analysis is applicable for

 neither planar and non planar networks..
 non planar networks.
 both planar and non planar networks.
 planar networks.

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Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.6.
 0.85.
 0.9.
 0.4.

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