Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 18

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The capacitance of a parallel plate capacitor is $12 μF .$ If the distance between its plates is reduced to half and the area of plates is doubled, then the capacitance of the capacitor will become

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Important Questions on Capacitance

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 19

The radius of the circular plates of a parallel plate capacitor is

R .

Air is the dielectric medium between the plates. If the capacitance of the capacitor is equal to the capacitance of a sphere of the radius

R,

then the distance between the plates is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 20

The work done against electric forces in increasing the potential difference of a condenser from

20 V

to

40 V

is

W

. The work done in increasing its potential difference from

40 V

to

50 V

will be

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 21

The magnitude of charge in steady-state on either of the plates of condenser $C$ in the adjoining circuit is-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 22

The plate separation in a parallel plate condenser is

d

and plate area is

A .

It is charged to

V

volt battery is disconnected, then the work done in increasing the plate separation to

2 d

will be,

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 23

A capacitor of capacitance

C_{1}

is charged to potential

V

and the battery is disconnected. Now the capacitor is connected to an uncharged capacitor of capacitance

C_{2}

then what will be the common potential of the combination-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 24

If the charge on a body is increased by

2 μC,

the energy stored in it increases by

21 % .

The original charge on the body in micro-coulombs is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 25

What fraction of the energy drawn from the charging battery is stored in a capacitor?

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 26

The plates of a parallel plate condenser are pulled apart with a velocity

v .

If at any instant mutual distance of separation is

d,

then the magnitude of the time of rate of change of electrostatic energy of the capacity depends on

d

as follows: (potential difference between plates is kept constant)-