| 1. | Which of the following· capacitor is preferred in case of single phase motor ? | |
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Mica capacitor
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Paper capacitor
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Electrolytic capacitor
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Ceramic capacitor
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Report Question| 2. | Mica capacitors are characterised by all of the following except ? | |
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stable operation
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accurate value
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low leakage reactance
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low losses
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| 3. | In order to remove static electricity from machinery ? | |
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construct insulated cabins
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insulate the machinery
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ground the framework
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humidify the surroundings
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| 4. | Which of the following medium will have highest value of relative permittivity ? | |
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Water
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Glass
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Mica
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Paper
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| 5. | Dielectric strength of medium ? | |
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increases with rise in temperature
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increases with moisture content
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is same for all insulating materials
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none of the above
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| 6. | ln a cable capacitor, voltage gradient is maximum at the surface of the ? | |
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earth
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conduction
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sheath
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insulator
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| 7. | Internal heating of a capacitor is usually attributed to ? | |
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electron movement
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leakage resistance
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dielectric charge
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plate vibration
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| 8. | The presence of an uncharged conductor near a charged one increases the ? | |
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charge of the charged conductor
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capacity of the charged conductor
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potential of the charged conductor
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all of the above
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| 9. | Electric displacement is a ...... quantity ? | |
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scalar
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vector
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both of the above
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none of the above
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| 10. | The electrons, in a dielectric, get detached from the atoms under ? | |
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high current
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high voltage
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variable current
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breakdown
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