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Electric Circuits

Electric Circuits
Which of following materials has the least resistivity ?

  Zinc.
  Copper.
  Lead.
  Mercury.

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Electric Circuits
Three 3Ω resistors are connected to form a triangle. What is the resistance between any two of the corner?

  2 Ω.
 6 Ω.
 9 Ω.
 3 Ω.

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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 × d.
  Q2 × d.
  Q / d2.
  Q2 / d.

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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?

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

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Electric Circuits
Among the options which metal has the highest electrical conductivity?

 Stranded aluminium.
 Steel.
 Copper.
 Aluminium.

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Electric Circuits
Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

 3.12.
 1.56.
 6.24.
 0.020.

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MORE MCQ ON Electric Circuits

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