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Electric Circuits

Electric Circuits
In series R, L circuit power factor can be defined as

All of these
 P/S
 Vr/V
 R/Z

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Electric Circuits
What is the SI unit of electric current ?

 Ampere.
 Ohm.
None of these
 Faraday.

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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?

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

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Electric Circuits
In active filter which element is absent?

 Resistor.
 Both of above.
 Capacitor.
 Inductor.

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Electric Circuits
A star connected load has three equal impedance each of (40 + j30) Ω If the line current is 5 A then value of line voltage is

 200 V.
 250 V.
 250 / √3 V.
 250 √3 V.

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Electric Circuits
In a lead acid cell PbSO4 formed during

  discharging only.
  both during charging as well as discharging.
  charging only.
  neither during charging nor discharging.

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MORE MCQ ON Electric Circuits

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