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Electrostatic and Capacitance

Electrostatic and Capacitance
An electrolytic capacitor is generally made to provide

Low capacitance
Large value of capacitance
Variable capacitance
Fixed capacitance

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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
A condenser suitable for D.C. only is

Metallic paper capacitor
Metallic plate variable gang condenser
Poled aluminium electrolytic condenser
Oil impregnated paper condenser

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Electrostatic and Capacitance
Of the following capacitors, which one has the highest dielectric constant?

Air
Glass
Mica
Paper

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

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Electrostatic and Capacitance
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.

Electric intensity
Magnetic flux density
None of these
Electric flux

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