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Electric Circuits

Electric Circuits
Atoms with fewer than 4 valence electrons are

 none of these.
 insulator.
 conductor.
 semi-conductor.

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Electric Circuits
Three identical resistor are connected in star across a 3 phase 550 V supply dissipating a total power of 300 W the line current is ____________ A.

 0.5
 2.56
 1
 3.149

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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

 0.4.
 0.85.
 0.9.
 0.6.

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Electric Circuits
What are the points to be mentioned in specifying main switches?

  None of these.
  Voltage grade.
  Both A and B.
  Current rating.

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Electric Circuits
Electric flux is proportional to

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

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Electric Circuits
The value of unity impulse function at time (t) = 0 is

 indeterminate.
 infinite.
 0.
 1.

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MORE MCQ ON Electric Circuits

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