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Electrostatic and Capacitance

Electrostatic and Capacitance
Which of the following capacitors is marked for polarity ?

Mica
Air
Paper
Electrolytic

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Electrostatic and Capacitance
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will

remain in stable equilibrium
move out of the field of influence of the two charges
be in unstable equilibrium
not be in equilibrium

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Electrostatic and Capacitance
If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

Increase
Remain same
Decrease
None of the listed here

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

KVA
KV
KW
KVAR

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Electrostatic and Capacitance
XC is inversely proportional to frequency and capacitance.

1

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Electrostatic and Capacitance
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is

0.4 s
0.6 s
1.2 s
0.8 s

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