Electrical Engineering MCQs

Page No. 163

The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?


aproportional to 7


bproportional to X


cproportional to distance between the conductors


dinversely proportional to I


View Answer proportional to X

Air gap has_________eluctance as compared to iron or steel path?


alittle


blower


c higher


d zero


View Answer lower

Which of the following is a vector quantity ?


aRelative permeability


b Magnetic field intensity


cFlux density


dMagnetic potential



A material which is slightly repelled by a magnetic field is known as_____________?


aferromagnetic material


bdiamagnetic material


c paramagnetic material


d conducting material


View Answer diamagnetic material

Fleming’s left hand rule is used to find_________________?


a direction of magnetic field due to current carrying conductor


bdirection of flux in a solenoid


c direction of force on a current carrying conductor in a magnetic field


dpolarity of a magnetic pole



Magnetising steel is normals difficult because____________?


ait corrodes easily


bit has high permeability


c it has high specific gravity


d it has low permeability



When an iron piece is placed in a magnetic field_____________?


athe magnetic lines of force will bend away from their usual paths in order to go away from the piece


bthe magnetic lines of force will bend away from their usual paths in order to pass through the piece


c the magnetic field will not be affected


dthe iron piece will break



The ratio of intensity of magnetisation to the magnetisation force is known as_____________?


aflux density


b susceptibility


crelative permeability


dnone of the above


View Answer susceptibility

Materials subjected to rapid reversal of magnetism should have______________?


alarge area oiB-H loop


b high permeability and low hysteresis loss


c high co-ercivity and high retentivity


dhigh co-ercivity and low density



The unit of relative permeability is_____________?


a henry/metre


b henry


chenry/sq. m


d it is dimensionless



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