Electrical Engineering MCQs

Page No. 333

The degree of mechanical vibrations produced by the laminations of a transformer depends on____________?


atightness of clamping


bgauge of laminations


csize of laminations


dall of the above


View Answer all of the above

A transformer core is laminated to__________?


areduce hysteresis loss


breduce eddy current losses


creduce copper losses


d reduce all above losses



In a transformer the energy is conveyed from primary to secondary_________?


a through cooling coil


b through air


c by the flux


dnone of the above


View Answer by the flux

Which of the following does not change in a transformer ?


aCurrent


bVoltage


cFrequency


dAll of the above


View Answer Frequency

One newton meter is same as_____________?


a one watt


bone joule


cfive joules


done joule second


View Answer one joule

1 angstrom is equal to______________?


a10-8 mm


b10″6 cm


c 10″10 m


d10~14 m


View Answer 10″10 m

Conductance : mho :: ____________?


aresistance : ohm


bcapacitance : henry


cinductance : farad


dlumen : steradian


View Answer resistance : ohm

Which of the following can have negative temperature coefficient _____________?


a Compounds of silver


bLiquid metals


cMetallic alloys


dElectrolytes


View Answer Electrolytes

When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?


a1 n-mho


b106 mho


c1 milli-mho


dnone of the above


View Answer 1 n-mho

Nichrome wire is an alloy of_____________?


alead and zinc


b chromium and vanadium


cnickel and chromium


dcopper and silver


View Answer nickel and chromium

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