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

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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

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ccharging current can flow

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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

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b coulombs/volt

✓


cohms

✖


dhenry/Wb

✖


View Answer coulombs/volt

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