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Electric Circuits

Electric Circuits
If one cycle of AC waveform occurs every millisecond, the frequency will be

 1000 Hz.
 10 kHz.
 50 Hz.
 100 Hz.

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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?

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

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Electric Circuits
Number of branches of a graph should be --------- number of branches of a network

 equals to
 greater than
 less than
 less than equals to

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Electric Circuits
An ideal constant voltage source has _______________ internal impedance whereas a constant current source has ____________ internal impedance.

 zero, zero
 infinite, zero
 infinite, infinite
 zero, infinite

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Electric Circuits
If a pure inductor is connected across the ac source, the average power taken by the inductor is

 100 watt.
 maximum power.
 zero watt.
 a few watt.

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Electric Circuits
Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

 2 Ohm and 2.5 Ohm.
 1.5 Ohm and 3 Ohm.
 1.25 Ohm and 3.25 Ohm.
 2.2 Ohm and 2.3 Ohm.

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MORE MCQ ON Electric Circuits

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