Electrical Engineering MCQs

Page No. 5

The force per unit charge is know as__________________?


aelectric flux


belectric intensity


celectric potential


d all of above are same


View Answer electric intensity

Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?


adecrease


bincrease


c remain constant


ddepends upon composition of dielectric


View Answer decrease

The minimum charge on any object cannot be less than_______________?


a1.6 x 10-19C


b3.2 x 10-19C


c9.1 x 109C


dno definite value exist


View Answer 1.6 x 10-19C

When we rub a glass rod with a silk cloth then________________?


aglass rod acquires negative charge while silk acquires positive charge


bglass rod acquires positive charge while silk acquires negative charges


c both glass rod and silk acquire negative charge


d both glass rod and silk acquire positive charge



A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?


aωB/r22-r12/Δt


bωB(r2-r1)2/Δt


cωB(r22-r12)/Δt


dωB(r22+r12)/Δt


View Answer ωB(r22-r12)/Δt

Self-inductance of a long solenoid is______________?


aμoN2A


bμoN2/A


c μoN2


dBA


View Answer μoN2A

The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________?


a1Hzs


b1.5Hzs


c106sec


d1sec


View Answer 1Hzs

Self inductance of a coil depends upon________________?


a current flowing


bnumber of turns per unit length


c voltage produce


dall


View Answer all

Energy stored in a magnetic field is given by______________?


aLI2


bL2I/2


c LI2/2


dIL2


View Answer LI2/2

For electroplating we use_________________?


a A D.C source


b an A.C source


cany source


d all of the above


View Answer A D.C source

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