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The work done in placing a charge of `8xx10^-18` coulomb on a condenser of capacity 100 micro-farad is

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The work done in placing a charge of `8xx10^-18` coulomb on a condenser of capacity 100 micro-farad is
A. `16xx10^(-32)J`
B. `31xx10^(-26)J`
C. `4xx10^(-10)J`
D. `32xx10^(-32)J`
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1 Answer

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Correct Answer - D
`"Here, "q=8xx10^(-18)C, C=100muF=10^(-4)F`
`V=(q)/(C)=(8xx10^(-18))/(10^(-4))=8xx10^(-14)V`
`"Work done "=(1)/(2)qV=(1)/(2)xx8xx10^(-18)xx8xx10^(-14)`
`=32xx10^(-32)J`
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