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Electrostatic and Capacitance

Electrostatic and Capacitance
The minimum value of potential gradient in a cable occurs in

outer sheath
uniformly all over
insulation
conductor

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Electrostatic and Capacitance
This mention statement is associated with "The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface".

Gauss's law
Kirchhoff's law
Faraday's law
Lenz's law

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Electrostatic and Capacitance
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased

VR and VC = 0
VR > VC
VR = VC
VC > VR

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Electrostatic and Capacitance
The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value

45
54
42
37

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Electrostatic and Capacitance
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

Mica capacitor
It depends on applied voltage
Ceramic capacitor
Both will have identical value of capacitance

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

KV
KVA
KW
KVAR

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