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Electric Circuits

Electric Circuits
Which battery is used in aeroplanes?

 Dry cell battery.
 None of them.
 Edission cell.
 Lead acid battery.

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Electric Circuits
While comparing magnetic field and electric circuits, the point of dissimilarity exists while considering

 permeance and conductance.
 mmf and emf.
 reluctance and resistance.
 flux and current flow.

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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.
  (-9.66 + j5) A.
  (-8.66 - j5) 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 voltage drop across R is

 40.8 V.
  30.6 V.
  50.8 V.
 24.4 V .

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Electric Circuits
The maximum power that can be transferred to the load resistor R from the voltage source in the figure is

 6/8W.
 7.5 W.
 1 W.
 9/8 W.

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Electric Circuits
A voltage source having an open circuit voltage of 100 V and internal resistance of 50 Ω is equivalent to a current source

 2 A with 50 Ω in parallel.
 2 A with 50 Ω in series.
 none of these.
 0.5 A in parallel with 50 Ω.

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