Electrical Engineering MCQs

Page No. 195

For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?


aDistance between plates


bArea of the plates


cNature of dielectric


dThickness of the plates



Which of the following capacitors will have the least variation ____________?


aPaper capacitor


bCeramic capacitor


cSilver plated mica capacitor


d None of the above



“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________?


aCoulomb’s square law


bGauss’s law


cMaxwell’s first law


dMaxwell’s second law


View Answer Gauss’s law

Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?


aVoltage across the plates increases


bvoltage across the plates decreases


c charge on the capacitor decreases


dcharge on the capacitor increases



Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?


a50


b100


c150


d 200


View Answer 100

Which of the following statements is correct ___________?


aAir capacitors have a black band to indicate the outside foil


bElectrolytic capacitor must be connected in the correct polarity


c Ceramic capacitors must be connected in the correct polarity


d Mica capacitors are available in capacitance value of 1 to 10 pF



If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________?


avarying voltage produces the charging and dicharging currents


bof high peak value


ccharging current can flow


ddischarge current can flow



A dielectric material must be____________?


a resistor


b insulator


cgood conductor


dsemi conductor


View Answer insulator

The capacitance of a capacitor is not affected by____________?


a distance between plates


barea of plates


cthickness of plates


dall of the above


View Answer thickness of plates

The units of capacitance are____________?


avolts/coulomb


b coulombs/volt


cohms


dhenry/Wb


View Answer coulombs/volt

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