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Electrostatic and Capacitance

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

0.2
0.0002
0.002
2.0

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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 ?

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

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Electrostatic and Capacitance
The units of volume charge density are

Coulomb/meter
Coulomb/meter
Coulomb/meter
Coulomb/meter

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Electrostatic and Capacitance
The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.

62, final
62, initial
37, final
37, initial

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Electrostatic and Capacitance
Which medium has the least dielectric strength ?

Water
Air
Paraffin wax
Glass

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Electrostatic and Capacitance
Which of the following expression is correct for electric field strength ?

None of the listed here
E = jtD
E = D2/t
E = D/€

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