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Electric Circuits

Electric Circuits
What is the frequency of domestic power in India?

 220 Hz.
 50 Hz.
 60 Hz.
 70 Hz.

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Electric Circuits
An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value?

 (3 + j4) pu
 (4 + j2 ) pu
 (2 + j4) pu
 (4 + j3) pu

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Electric Circuits
Electric flux is proportional to

 resistivity of medium.
 potential difference between electrodes.
 rate of change of potential difference.
 rate of change of current.

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Electric Circuits
In 2 port network Z12 = Z21 indicates which property

 linear.
 bilateral.
 unilateral.
 non linear.

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Electric Circuits
Which of the following materials has highest electrical conductivity ?

  Silver.
  Steel.
  Copper.
  Aluminium.

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Electric Circuits
Lowest current density is generally recommended for plating of

 cadmium.
 silver.
 chromium.
 bronze.

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