Q. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be 60 N30 N40 N15 N Answer: 30 N
READ MORE +Electrostatics MCQs
Q. If 5 J of work is required to shift 10 C charge from one place to another then potential difference is 0.5 V2 V5 V10 V Answer: 0.5 V
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Q. The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be 36 x 10fa36 x 107 N36 x 108 N36 x 109 N Answer: 36 x 109 N
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Q. For closer tolerances which of the following capacitors is usually preferred ? Paper capacitorMica capacitorCeramic disc capacitorNone of the above Answer: Mica capacitor
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Q. Paper capacitors usually have a tolerance of ± 5%± 10%± 15%± 20% Answer: ± 10%
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Q. Which of the following capacitors will have the least value of breakdown voltage ? MicaPaperCeramicElectrolytic Answer: Electrolytic
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Q. The value of dielectric constant for vacuum is taken as zero1410 Answer: 1
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Q. Which of the following capacitors is marked for polarity ? AirPaperMicaElectrolytic Answer: Electrolytic
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Q. Which capacitor will be physically smaller for the same ratings ? Ceramic capacitorPaper capacitorBoth will be of equal sizeNone of the above Answer: Ceramic capacitor
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Q. Dielectric constant for mica is nearly 2001003 to 81 to 2 Answer: 3 to 8
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Q. The breakdown voltage for paper capacitors is usually 20 to 60 volts200 to 1600 volts2000 to 3000 voltsmore than 10000 volts Answer: 20 to 60 volts
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Q. Which of the following material has least value of dielectric constant ? CeramicsOilGlassPaper Answer: Oil
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