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Electric Circuits

Electric Circuits
Which battery is used in aeroplanes?

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

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Electric Circuits
What is the relation between time period T and frequency?

 T = 0.5 / frequency.
 T = 1 / frequency.
 T = frequency.
 T = 0.85 / frequency.

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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.

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

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Electric Circuits
The indication of the state of charge of a battery is best given by

 colour of electrolyte.
 level of electrolyte.
 specific gravity of electrolyte.
 temperature of electrolyte.

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Electric Circuits
If a function is shifted by 'T', then it is correctly represented as

 f (t-T) u (t).
 f (t) u (t-T).
 f (t-T) u (t-T).
 f (t) u (t).

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Electric Circuits
What will be the capacitance when distance between the 2 plates of a condenser of capacitance 8 micro farad is reduced from 10 mm to 4 mm?

 1 microfarad.
 20 microfarad.
 8 microfarad.
 3.2 microfarad.

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