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The electric potential at the surface of...

The electric potential at the surface of an atomic nucleus (Z=50) of radius 9 fermi is

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Given, `r=(12.4)/(2)=6.2" fm"=6.2xx10^(-15)"m and "Z=47`
`:." "q="Ze"=47xx1.6xx10^(-19)C" "(becausee=1.6xx10^(-19)C)`
`:.` Electrostatic potential,
`V=(q)/(4piepsilon_(0)r)=(9xx10^(9)xx47xx1.6xx10^(-19))/(6.2xx10^(-15))=1.09xx10^(7)V`
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