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Electrostatic and Capacitance

Electrostatic and Capacitance
The relative permittivity has the following units

Wb/m
no units
F/m
m/F

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Electrostatic and Capacitance
A condenser suitable for D.C. only is

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

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Electrostatic and Capacitance
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be

1600
400
1200
800

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Electrostatic and Capacitance
Dielectric strength of mica is

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

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Electrostatic and Capacitance
The dissipation factor of a good dielectric is of the order of

0.0002
0.2
0.002
2.0

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Electrostatic and Capacitance
The inverse of capacitance is called

elastance
reluctance
conductance
susceptance

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MORE MCQ ON Electrostatic and Capacitance

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