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Electrostatic and Capacitance

Electrostatic and Capacitance
Permittivity is expressed in

Weber/sq-m
Weber/meter
Farad/meter
Farad/sq-m

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Electrostatic and Capacitance
The units of capacitance are

Coulomb/volt
Hennry/wb
Volt/coulomb
Hennry

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Electrostatic and Capacitance
A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

25 times larger than before
10 times greater than before
5 times greater than before
5 times smaller than before

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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

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

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Electrostatic and Capacitance
A dielectric material must be

Good conductor
Insulator
Semi conductor
Resistor

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Electrostatic and Capacitance
The capacity of capacitor bank used in power factor correction is expressed in terms of

KV
KVAR
KW
KVA

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MORE MCQ ON Electrostatic and Capacitance

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