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Electric Circuits

Electric Circuits
The mass of the atom is determined by

 electrons.
 neutron and proton.
 electron and proton.
 proton.

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

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Electric Circuits
A parallel plate capacitor has a capacitance of C farad. It area of the plates is doubled and the distance between them is half, the capacitance of the capacitor is

 16C Farad.
 C Farad.
 4C Farad.
 2C Farad.

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 0.741 A.
 1.414 A.
 0.494 A.
 1.57 A.

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Electric Circuits
An electric field can deflect

 alpha particles.
 gamma-rays.
 neutrons.
 x-rays.

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Electric Circuits
The instantaneous values of line current into a delta connected load in any two lines are + 2.5 amps and - 1.25 amps the current in the third line at the instant is ___________ A.

 1
 2.5
 10
 - 1.25

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