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Electric Circuits

Electric Circuits
In what connection we get neutral?

  Delta.
  Star.
  Both A and B.
  Mesh.

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Electric Circuits
The life of a lead acid battery is expected to be

 6 months.
 10 to 15 years.
 1 year.
 2 to 5 years.

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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

 32.1o.
 20.2o.
 28.8o.
 40.4o.

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Electric Circuits
Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

  3 Ω and 6 Ω.
 6 Ω and 9 Ω.
 3 Ω and 9 Ω.
  1.5 Ω and 3 Ω.

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Electric Circuits
If a resistor and an inductor are connected in series across a voltage source. Which two parameters in that circuit increase if frequency of voltage source increases?

 VL and Z.
 VL and I.
 Z and I.
 VL and VR.

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Electric Circuits
Phase voltages of a star connected alternator are ER = 240∠0o V, EY = 240∠-120o V and EB = 240∠ + 120o V. What is the phase sequence of the system?

 RBY.
 YBR.
 RYB.
 BYR.

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MORE MCQ ON Electric Circuits

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