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A capacitor of capacitance 10muF charged...

A capacitor of capacitance `10muF` charged to 100V is connected to an uncharged capacitor. The effective potential now is 40 V. The capacitance on uncharged capacitor is

A

`12muF`

B

`15muF`

C

`25muF`

D

`30muF`

Text Solution

Verified by Experts

The correct Answer is:
B
Common potential of system
`V=(C_(1)V_(1)+C_(2)CV_(2))/(C_(1)+C_(2))rArr 40=(10xx100+C_(2)xx0)/(10+C_(2))`
`"or "40(10+C_(2))=1000 rArr C_(2)=15muF`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROSTATICS-PRACTICE EXERCISE (Exercise 2 (MISCELLANEOUS PROBLEMS))
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  11. Three capacitors 3muF, 6muF and 6muF are connected in series to a sou...

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  13. If dielectric is inserted in charged capacitor ( battery removed ), t...

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  14. A capacitor of capacitance 10muF charged to 100V is connected to an un...

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  15. A parallel plate capacitor is made of two circular plates separated by...

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  16. Two capacitors of 10 pF and 20 pF are connected to 200 V and 100 V sou...

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  17. A gang capacitor is formed by interlocking a number of plates as shown...

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  18. The equivalent capacitance of the combination of the capacitors is :

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