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

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

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Important Questions on Capacitance

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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)-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 27

125

water drops of equal radii and equal capacitance

C

coalesce to form a single drop of capacitance

C^{'}

. The relation between

C

and

C^{'}

is,

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 28

Energy per unit volume for a capacitor having area

A

and separation

d

kept at the potential difference

V

is given by

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 29

The mean electric energy density between the plates of a charged capacitor is (here

q =

charge on the capacitor and

A =

area of the capacitor plate)

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 30

A capacitor when charged by a potential difference of

200 V

, stores a charge of

0.1 C

. By discharge, the energy liberated by the capacitor is-

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 31

The work done in placing a charge of

8 \times 10^{- 18} C

on a condenser of capacity

100 μF

is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 32

The work done in doubling the separation between plates of a parallel plate capacitor of capacity

C

and having charge

Q

is,

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 33

In the adjoining diagram, (assuming the battery to be ideal) the condenser $C$ will be charged to potential $V$ if

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