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Electric Circuits

Electric Circuits
From the circuit diagram shown in question 1 find the Norton current.

 2.5 A.
 2 A.
 1 A.
 4 A.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The phase angle of current in respect of supply voltage will be

 40.4o.
 28.8o.
 20.2o.
 32.1o.

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Electric Circuits
When AC flows through a pure capacitance then the current

 leads the emf by 90o.
 leads the emf by - 90o.
 lags the emf by 90o.
 is in phase with emf.

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Electric Circuits
Aluminium is produced from bauxite by

  rotating.
  froth flotation.
  oxidation.
  electrolytic process.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Core.
 Inductance.
 Air gap.
 Coil.

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Electric Circuits
The laplace transform of the fuction f(t) = t is

 s.
 1/s2.
 s2.
 1/s.

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