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Electrostatic and Capacitance

Electrostatic and Capacitance
Dielectric strength of a medium is usually expressed in

N/mm
None of the listed here
KV/mm
C/mm

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Electrostatic and Capacitance
A dielectric material must be

Insulator
Resistor
Semi conductor
Good conductor

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Electrostatic and Capacitance
The dielectric constant is the ability of a material to establish an electric field.

1

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Electrostatic and Capacitance
Dielectric constant for mica is nearly

100
1 to 2
200
3 to 8

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Electrostatic and Capacitance
A capacitance is a circuit component that opposes the change in circuit

Current
None of the listed here
Impedance
Voltage

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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

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

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