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Electric Circuits

Electric Circuits
Which of the following has no units?

 Magnetic susceptibility
 Moment of a magnet
 Permeability
 Permittivity

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Electric Circuits
In which braking back emf exceeds supply voltage?

  Dynamic.
  Plugging.
  Regenerative.
  None of these.

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Electric Circuits
For Norton’s equivalent circuit

 Isc = Voc / Req.
 Voc = Req /Isc.
 Voc = Isc / Req.
 Isc = Voc Req.

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Electric Circuits
Three parallel resistive branches are connected across a DC supply. The ratio of the branch resistances are given as R1:R2:R3 :: 2:4:6. The ratio of the branch currents is

 6:3:2.
 2:4:6.
 2:3:6.
 6:4:2.

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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

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

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Electric Circuits
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be

 160 µF
 40 µF
 5 µF
 10 µF

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MORE MCQ ON Electric Circuits

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