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.Management Sciences
Category: Electrical Engineering Mcqs
In a npn transistor,_____________are the minority carriers?
A. free electrons
B. holes
C. donor ions
D. acceptor ions
The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is_____________?
A. 1 A
B. 7 A
C. unknown
D. the larger of the two
In square wave operation mode of 3 phase VSI, the VSI
A. Can control the load voltage
B. Cannot control the load voltage
C. Cannot control the load voltage except by means of dc link voltage
D. Cannot control the load voltage except by means of dc link current
A perfect black body is one that_____________?
A. transmits all incident radiations
B. absorbs all incident radiations
C. reflects all incident radiations
D. absorbs, reflects and transmits all incident radiations
Efficiency of a power transformer is of the order of________________?
A. 100 per cent
B. 98 per cent
C. 50 per cent
D. 25 per cent
Satellite power requirement is provided through________?
A. solar cells
B. dry cells
C. nickel-cadmium cells
D. lead-acid batteries
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be______________?
A. 400 N/C
B. 600 N/C
C. 800 N/C
D. 1200 N/C
Time constant of a capacitive circuit__________?
A. increases with the decrease of capacitance and decrease of resistance
B. increases with the decrease of capacitance and increase of resistance
C. increases with the increase of capacitance and decrease of resistance
D. increase with increase of capacitance and increase of resistance
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