Electrical Engineering MCQs

Page No. 166

One maxwell is equal to____________?


a 10 webers


b10 webers


c10 webers


d10 webers


View Answer 10 webers

Out of the following statements, concerning an electric field, which statement is not true ?


aThe electric intensity is a vector quantity


b The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point


cAn electric field is defined as a point in space at which an electric charge would experience a force


dUnit field intensity in the exertion of a force of one newton on a charge of one coulomb



Susceptibility is positive for______________?


anon-magnetic substances


bdiamagnetic substances


cferromagnetic substances


dnone of the above



When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon____________?


aresistance of the coil


bmotion of the magnet


cnumber of turns of the coil


dpole strength of the magnet



When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?


awill be zero


b will be infinite


cwill depend on the amount of e.m.f. applied


dwill depend on the radius of the circle



A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be____________?


a240 N


b 24 N


c 2.4 N


d0.24 N


View Answer 2.4 N

Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be_____________?


a2500 AT/m


b250 AT/m


c25 AT/m


d2.5 AT/m


View Answer 250 AT/m

A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be_____________?


a8 N-m


b 0.48 N-m


c 0.048 N-m


d0.0048 N-m


View Answer 0.048 N-m

A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?


a63.38 N/Wb


b633.8 N/Wb


c6338 N/Wb


d63380 N/Wb


View Answer 6338 N/Wb

Unit for quantity of electricity is_____________?


aampere-hour


bwatt


cjoule


dcoulomb


View Answer coulomb

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