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Electrostatic and Capacitance

Electrostatic and Capacitance
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by

R/C
RC
C/R
1/RC

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Electrostatic and Capacitance
The absolute permittivity of free space is given by

8.854 x KT11 F/m
8.854 x 1(T10 F/m)
8.854 x 10?12 F/m
8.854 x 1(T9 F/m)

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Electrostatic and Capacitance
Dielectric constant for mica is nearly

200
3 to 8
1 to 2
100

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Electrostatic and Capacitance
What is the capacitance when Q = 60 µC and V = 12 V?

720 µF
5 µF
12 µF
50 µF

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Electrostatic and Capacitance
Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as

milli-coulomb
coulomb
pico-coulomb
micro-coulomb

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Electrostatic and Capacitance
Four 0.15 µF capacitors are in parallel. The total capacitance is

0.6 µF
0.15 µF
0.30 µF
0.8 µF

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