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Electric Circuits

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

 2.185.
 2.585.
 1.285.
 2.9585.

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Electric Circuits
To find the initial value of a function, the highest power of S in denominator should be ---------- the highest power of S in the numerator.

 both a and c
 equals to
 less than
 greater than

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Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 30∠30o Ω.
 27∠30o Ω
 3∠30o Ω.
None of these

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Electric Circuits
The capacity of a lead acid cell does not depends on its

 rate of discharge.
 temperature.
 quantity of active material.
 rate of charge.

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Electric Circuits
The internal resistance of a practical voltage source is considered to be connected in

 series.
None of these
 either parallel or series.
 parallel.

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Electric Circuits
A parallel plate capacitor contain there dielectric layers of 1, 2 and 3 respectively and thickness of dielectric layers are 0.2 mm, 0.3 mm and 0.4 mm respectively. If area of plate is 20 cm2. What is the value of capacitance?

 32 pF.
 30 pF.
 36.6 pF.
 None of them.

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