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Electrostatic and Capacitance

Electrostatic and Capacitance
Permittivity is expressed in

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

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Electrostatic and Capacitance
In order to remove static electricity from machinery

humidify the surroundings
ground the framework
construct insulated cabins
insulate the machinery

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Electrostatic and Capacitance
If three 10 uF capacitors are connected in parallel, the net cararitance is

15 uF
40 uF
30 uF
20 uF

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

5 µF
720 µF
12 µF
50 µF

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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
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?

It will melt
It will get punctured or cracked
It will become magnetic
Its molecular structure will get changed

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