| 1. | The capacitor preferred for high frequency circuits is ? | |
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air capacitor
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mica capacitor
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electrolytic capacitor
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none of the above
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Report Question| 2. | The capacitance of a capacitor is influenced by ? | |
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plate area
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plate separation
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nature of dielectric
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all of the above
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| 3. | The breakdown voltage for paper capacitors is usually ? | |
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20 to 60 volts
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200 to 1600 volts
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2000 to 3000 volt
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more than 10000 volts
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| 4. | ...... capacitors can be used only for A.C ? | |
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Air
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Paper
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Mica
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Electrolytic
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| 5. | ....... is that. property of a capacitor which delays any change of voltage across it ? | |
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Inductance
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Capacitance
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Potential gradient
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None of the above
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| 6. | Permittivity is expressed in ? | |
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Farad/sq-m
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Farad/metre
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Weber/metre
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Weber/sq-m
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| 7. | Paper condenser is ? | |
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always polarised
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usually of fixed value
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electrolytic condenser
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a variable condenser
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| 8. | If a third equal and similar charge is placed between two equal and similar charges, then this third charge will ? | |
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move out of the field of influence of the two charges
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remain in stable equilibrium
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not be in equilibrium
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be in unstable equilibrium
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| 9. | A positive and a negative charge are initially 50 mm apart. When they are moved close together so that· they are now only 10 mm apart, the force between them will be ? | |
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6 times smaller than before
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5 times greater than before
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10 times greater than before
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25 times larger than before
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| 10. | To prevent the generation of static charges on rubber or flat leather ? | |
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surface is moistened
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conductive dressing is done
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oil compound dressing is done
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talcum powder is sprayed on the surface
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