Electrical Engineering MCQs

Page No. 185

Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules_______________?


aCV2


bC2V


cCV2


d CV


View Answer CV2

When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of_____________?


a 2 joules


b4 joules


c6 joules


d8 joules


View Answer 8 joules

Dielectric constant for mica is nearly_____________?


a 200


b100


c3 to 8


d1 to 2


View Answer 3 to 8

What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?


a50 pF


b100 pF


c150 pF


d200 pF


View Answer 100 pF

The capacitor preferred for high frequency circuits is_____________?


aair capacitor


bmica capacitor


c electrolytic capacitor


dnone of the above


View Answer mica capacitor

If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be____________?


a800 uC


b900 uC


c1200 uC


d1600 uC


View Answer 1200 uC

Which of the following material has least value of dielectric constant ?


aCeramics


b Oil


c Glass


dPaper


View Answer Oil

For closer tolerances which of the following capacitors is usually preferred ?


a Paper capacitor


bMica capacitor


cCeramic disc capacitor


dNone of the above


View Answer Mica capacitor

Paper capacitors usually have a tolerance of___________?


a± 5%


b± 10%


c± 15%


d± 20%


View Answer ± 10%

“The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with_______?


aGauss’s law


b Kirchhoff s law


cFaraday’s law


dLenz’s law


View Answer Gauss’s law

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