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Electrostatic and Capacitance

Electrostatic and Capacitance
Dielectric strength of mica is

10 to 20 kV/mm
30 to 50 kV/mm
50 to 200 kV/mm
300 to 500 kV/mm

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Electrostatic and Capacitance
A region around a stationary electric charge has

An electric field
Both Electric & Magnetic
A magnetic field
None of the listed here

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Electrostatic and Capacitance
The breakdown voltage for paper capacitors is usually

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

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Electrostatic and Capacitance
What is the capacitance when Q = 60 µC and V = 12 V?

50 µF
720 µF
12 µF
5 µF

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

low leakage reactance
stable operation
accurate value
low losses

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Electrostatic and Capacitance
Which of the following capacitors preferred for high frequency circuits ?

Electrolytic capacitor
None of these
Air capacitor
Mica capacitor

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