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Electric Circuits

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

 1.285.
 2.185.
 2.585.
 2.9585.

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Electric Circuits
A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest?

 10 Hz.
 1000 Hz.
 1 Hz.
 100 Hz.

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Electric Circuits
Which quantity consists of a unit 1KWh ?

 Energy
 Time
 Power
 Charge

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Electric Circuits
Electric field intensity ( E ) at any point in an electric field is equal to

 ( potential gradient )1/3.
 ( potential gradient )2.
 potential gradient.
 ( potential gradient )1/2.

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Electric Circuits
A parallel plate capacitor has a capacitance of C farad. It area of the plates is doubled and the distance between them is half, the capacitance of the capacitor is

 4C Farad.
 16C Farad.
 C Farad.
 2C Farad.

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Electric Circuits
In above question, if circuit efficiency is 90 %. What will be output power ?

  37.3 kW.
  30 kW.
  40 kW.
  35.6 kW.

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