Electrical Engineering MCQs

Page No. 165

In the left hand rule, forefinger always represents______________?


avoltage


b current


cmagnetic field


d direction of force on the conductor


View Answer magnetic field

Ferrites are a sub-group of_______________?


anon-magnetic materials


bferro-magnetic materials


c paramagnetic materials


dferri-magnetic materials



Reciprocal of permeability is____________?


areluctivity


bsusceptibility


cpermittivity


dconductance


View Answer reluctivity

Which of the following is the unit of magnetic flux density ?


a weber


blumens


c tesla


dnone of the above


View Answer tesla

The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields______________?


ameter is surrounded by strong magnetic fields


b a soft iron shielding is used


ca plastic shielding is provided


d a shielding of anon-magnetic material is used



The relative permeability is less than unity is case of_____________?


aferromagnetic materials


b ferrites


cnon-ferrous materials


ddiamagnetic materials


View Answer diamagnetic materials

Which of the following is not a unit of flux?


aMaxwell


bTelsa


cWeber


dAll of the above


View Answer Telsa

One telsa is equal to___________?


a 1 Wb/mm2


b1 Wb/m


c 1 Wb/m2


d1 mWb/m2


View Answer 1 Wb/m2

The magnetism left in the iron after exciting field has been removed is known as____________?


a permeance


bresidual magnetism


csusceptance


dreluctance


View Answer residual magnetism

Which of the following is expected to have the maximum permeability ?


a Brass


bCopper


cZinc


d Ebonite


View Answer Ebonite

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