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Electric Circuits

Electric Circuits
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be

 25 µF
 10 µF
 1 µF
 5 µF

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Electric Circuits
Condition for reciprocity in case of ABCD parameters is

  AB-CD = 0.
 AB-CD = 1.
 AD-BC = 1 .
 AD-BC = 0.

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Electric Circuits
Which of the following has no units?

 Permeability
 Magnetic susceptibility
 Permittivity
 Moment of a magnet

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Electric Circuits
In the circuit shown below, find the thevnin equivalent resistance.

 5 Ohm.
 6/5 Ohm.
 1.5 Ohm.
 5/6 Ohm.

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 42.4sin50πt.
 42.4sin25πt.
 30sin25πt.
 30sin50πt.

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Electric Circuits
An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value?

 (2 + j4) pu
 (4 + j2 ) pu
 (3 + j4) pu
 (4 + j3) pu

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