Q. An electrolytic capacitor can be used for D.C. onlyAC. onlyboth D.C. as well as A.C. Answer: D.C. only
READ MORE +Electrostatics MCQs
Q. In electrostatic air cleaner, air mixed with dust and pollen enters device across positively charged meshnegatively charged meshneutral meshdual charged mesh Answer: positively charged mesh
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Q. If a charged rod is brought closer to a gas filled balloon then Radius decreasesBalloon burstsRadius increaseBalloon squeezes Answer: Radius increase
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Q. Coulomb's force between 2 point charges 10µC and 5µC placed at a distance of 150cm is 0.2 N0.5 N2 N10 N Answer: 0.2 N
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Q. Ability of capacitor to store charge depends upon area of platesdistance between platestype of dielectric usedall of above Answer: all of above
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Q. In combination of capacitors in series, capacitors are connected parallelside by sideup and downnone of the above Answer: side by side
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Q. Coulomb's law is only true for point charges whose sizes are mediumvery largevery smallnone of the above Answer: very small
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Q. If metallic conductor is charged negatively then its weight Remains sameFirst increases then decreasesDecreases then increasesIncreases for a while Answer: Increases for a while
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Q. Photocopier and inject printer are dealt in ElectrostaticsCharges in motionCapacitorsElectric fields Answer: Electrostatics
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Q. SI unit of electric potential is voltsohmcoulombnewton Answer: volts
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Q. 3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in parallel combination with a battery of 5V, as 1µF = 10-6F, voltage across each capacitor is 15V5V18V20V Answer: 5V
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Q. An electric charge at rest produces only a magnetic fieldonly an electric fieldneither electric field nor magnetic fieldboth electric and magnetic fields Answer: only an electric field
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