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Electric Circuits

Electric Circuits
Container of a lead acid battery

 molded hard rubber.
 any of above.
 ceramics.
 celluloid.

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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
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF.

 0.01C and 5W.
 0.1C, 10MW.
 0.01C, 10MW.
 0.1C, 100MW.

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Electric Circuits
Voltage magnification will occur in which of the following case?

 Parallel resonance
 Series resonance
 Both
None of these

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Electric Circuits
According to duality principle a series inductor (L) can be represented as

 Series L.
 Series C.
 Parallel C.
 Parallel L.

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Electric Circuits
Two battery having unequal emf

 can be connected in series only.
 cannot be connected in parallel.
 both a and d
 cannot be connected in series.

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