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Electric Circuits

Electric Circuits
Which of the followings is the expression for energy stored in a capacitor?

 C / v.
 (1 / 2) Cv2.
 Cv.
 C dv / dt.

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Electric Circuits
The frequency of EMF generated by a generator depends upon its

 both speed and number of poles.
 nature of supply.
 number of poles.
 speed.

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Electric Circuits
The efficiency in case of maximum power transfer theorem is

 50 % - 100 %.
 50 %.
 less than 50 %.
 100 %.

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Electric Circuits
If a capacitors of capacitance 100 μF is connected across a voltage source of 10 V, then what will be the energy stored in that capacitor?

 5 × 10 - 2 Joule.
 10 × 10 6 Joule.
 10 × 10 - 3 Joule.
 5 × 10 - 3 Joule.

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Electric Circuits
What is represented by the hypotenuse of impedance triangle?

 Resistance drop.
 Reactance drop.
 Impedance drop.
 Apparent power.

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Electric Circuits
Which of the following represents the resonance frequency (ω0) with respect to lower cutoff frequency (ω1) and higher cutoff frequency (ω2)

 ω1 + ω2
 √(ω1² + ω2²)
 ω1 - ω2
 ω1 / ω2

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