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Electrostatic and Capacitance

Electrostatic and Capacitance
The lines of force due to charged particles are

always curved
always straight
sometimes curved
None of these

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

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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
Both will have identical value of capacitance
Ceramic capacitor

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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

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

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

C/R
R/C
RC
1/RC

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Electrostatic and Capacitance
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

None of the listed here
Decrease
Remains same
Increase

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