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Electrostatic and Capacitance

Electrostatic and Capacitance
Which of the following capacitors will have the least value of breakdown voltage ?

Paper
Electrolytic
Mica
Air

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Electrostatic and Capacitance
The breakdown voltage for paper capacitors is usually

200 to 1600 volts
2000 to 3000 volts
more than 10000 volts
20 to 60 volts

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Electrostatic and Capacitance
Which of the following capacitors will have the least variation?

Silver plate mica capacitor
None of the listed here
Ceramic capacitor
Paper capacitor

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Electrostatic and Capacitance
Mica capacitors are characterised by all of the following except

low leakage reactance
accurate value
stable operation
low losses

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Electrostatic and Capacitance
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is

23.41 Ω
46.8 Ω
4.68 Ω
11.70 Ω

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Electrostatic and Capacitance
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is

62 x 105 V/m
92 x 105 V/m
72 x 105 V/m
82 x 105 V/m

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