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Electric Circuits

Electric Circuits
Specific resistance is measured in

  ohm - cm.
  ohm.
  ohm/cm.
  mho.

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Electric Circuits
Which metal is deposited for electro forming?

  Chromium.
  Silver.
  Nickel.
  Iron.

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Electric Circuits
A 2m long conductor, carries a current of 50 A at a magnetic field of 100 × 10 − 3 T. The force on the conductor is

 10 N.
 10000 N.
 100 N.
 1000 N.

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Electric Circuits
In RL series circuit R=2Ω and L=2mH. What is the value of time constant?

 2msec
 1msec
 4msec
 100sec

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Electric Circuits
A wire 2.5 m long is bent into a square. An current of 100 A flowing through the wire will produce a magnetizing force at the center of the square, equal to

 144 AT / m.
 72 AT / m.
 222 AT / m.
 196 AT / m.

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Electric Circuits
The instantaneous values of line current into a delta connected load in any two lines are + 2.5 amps and - 1.25 amps the current in the third line at the instant is ___________ A.

 10
 1
 - 1.25
 2.5

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MORE MCQ ON Electric Circuits

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