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

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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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Important Questions on Capacitance

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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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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 38

Two parallel plate condensers of capacity of

20 μF and 30 μF

are charged to the potentials of

30 V

and

20 V

, respectively. If likely charged plates are connected together, then the common potential difference will be

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 39

The work done in placing a charge of

8 \times 10^{- 18}

coulomb on a condenser of capacity

100

micro-farad is

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Alpha Question Bank for Medical: Physics>Chapter 23 - Capacitance>Exercise-1>Q 40

A capacitor is charged by connecting a battery across its plates. It stores energy

U

. Now the battery is disconnected and another identical capacitor is connected across it, then the energy stored by both capacitors of the system will be