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A capacitor is chared to store an energy...

A capacitor is chared to store an energy `U`. The charging battery is disconnected. An identical capacitor is now connected to the first capacitor in parallel. The energy in each capacitor is now.

A

`(U)/(2)`

B

U

C

`(U)/(4)`

D

`(3U)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
`V=(C_(1)V_(1)+C_(2)V_(2))/(C_(1)+C_(2)), U=(1)/(2)(C_(1)+C_(2))V^(2)`
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NARAYNA-ELECTROSTATIC POTENTIAL AND CAPACITANCE-EXERCISE -2 (H.W)
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  4. Force of attraction between the plates of a parallel plate capacitor i...

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  5. Seven capacitors each of capacitance 2muF are to be connected in a con...

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  6. The equivalent capacitance between 'A' and 'B' in the adjoining figure...

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  7. If metal section of shape H is inserted in between two parallel plates...

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  8. The equivalent capacitance C(AB) of the circuit shown in the figure ...

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  9. In the figure shown the effective capacity across P & Q is ( the area...

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  10. A capacitor 4muF charged to 50V is connected to another capacitor 2mu...

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  11. A 4muF capacitor is charged by a 200 V supply. It is then disconnected...

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  12. A capacitor of capacity C hasd charge Q and stored energy is W. if the...

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  13. The equivalent capacitance between points M and N is

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  14. Two capacitors C(1)=2muF and C(2)=6muF in series, are connected in pa...

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  15. A capacitor is chared to store an energy U. The charging battery is di...

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  16. A parallel plate condenser with a dielectric of dielectric constant K ...

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  17. A parallel plate capacitor of capacitty 100 mu F is charged by a batte...

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  18. One plate of a capacitor is connected to a spring as shown in figure. ...

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  19. A parallel plate capacitor of capacitance C is connected to a battery ...

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  20. Two identical capacitors, have the same capacitance C. One of them is ...

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