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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Plugging.
  Dynamic.
  Regenerative.
  None of these.

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Electric Circuits
The delta equation of given star connected impedance ZQR is equal to

  (10 + j30) Ω.
 (5 + j10 / 3) Ω.
 (20 + j10) Ω.
 40 Ω.

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Electric Circuits
You have to replace 1500 Ω resistor in radio. You have no 1500 Ω resistor but have several 1000 Ω ones which you would connect

 three in parallel.
 three in series.
 two in parallel.
 two in parallel and one in series.

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Electric Circuits
By which of the following elements transients will not occur?

 R
 L
 C
All of these

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Inductance.
 Air gap.
 Coil.
 Core.

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Electric Circuits
Which of the following theorems can be applied to any network- linear or nonlinear, active or passive, time variant or time invariant?

 Norton Theorem.
 Tellegen theorem.
 Millman theorem.
 Thevnin theorem.

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