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Electric Circuits

Electric Circuits
The value of specific gravity of acid when a lead acid battery is fully charged is

 2.585.
 2.185.
 1.285.
 2.9585.

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 open circuit.
 dielectric losses increases.
 dielectric losses decreases.

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Electric Circuits
In a capacitor the electric charge is stored in

 dielectric.
 none of above.
 both of (A) and (B).
 metal plates.

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Electric Circuits
A capacitor having a mica dielectric εR = 6, a plate area of a 10 inches2 and a separation 0.01 inch. Find the value of C

 1.349 F.
 0 F.
 1.349 nF.
 1.349 μF.

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Electric Circuits
A 3Ω resistor having 2A current will dissipate the power of

 4 W.
 12 W.
 2 W.
 8 W.

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Electric Circuits
A balanced star connected load with impedance of 30j - 300 Ω is supplied from a 3 - phase, 4-wire, 173 V system, the voltages to neutral being 100j -900, 100j - 300 and 100j -1500 V. The current in neutral wire is

  50 A.
  5 A.
  8.85 A.
  zero.

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