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

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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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Important Questions on Capacitance

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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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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 34

A capacitor

4 μ F

charged to

50 V

is connected to another capacitor of

2 μ F

charged to

100 V

with plates of like charges connected together. The total energy before and after connection in multiples of

(10^{- 2} J)

is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 35

A condenser of capacitance

10 mF

has been charged to

100

volts. It is now connected to another uncharged condenser in parallel. The common potential becomes

40

volts. The capacitance of another condenser is,

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 36

Two capacitors of capacitances

3 μF

and

6 μF

are charged to a potential of

12 V

each. They are now connected to each other, with the positive plate of each joined to the negative plate of the other. The potential difference across each will be

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 37

In the following figure, the charge on each condenser in the steady state will be-

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