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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 All of above.
 Current.
 Voltage.
 Power factor.

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Electric Circuits
For balanced star load, if unbalanced line current are IR, IY, IB equal to - j10, - j10 and - j20 respectively, the neutral current will be equal to

  (8.66 + j5) A.
  (-8.66 - j5) A.
  (8.66 - j5) A.
  (-9.66 + j5) A.

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Electric Circuits
In the circuit given, I = 1 A for Is = 0. What is the value of I for Is = 2 A ?

 4 A.
  2 A.
 1 A.
 3 A.

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Electric Circuits
Air gap flux density is of the order of

  0.35 - 0.5 T.
  0.65 - 0.9 T.
 0.75 - 0.8 T.
 0.85 - 0.9 T.

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Electric Circuits
In which of the following networks it is not possible to find the transient free response?

 RL
 RC
 RL, RC, and RLC
 RLC

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Electric Circuits
Internal heating of a capacitor is usually attributed to

 leakage resistance.
 dielectric charge.
 plate vibration.
 electron movement.

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