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JCECE Engineering JCECE Engineering Solved Paper-2010

  • question_answer
    If a charged spherical conductor of radius \[10\,\,cm\] has potential \[V\] at a point distant \[5\,\,cm\] from its centre, then the potential at a point distant \[15\,\,cm\] from the centre will be

    A) \[\frac{1}{3}V\]                                

    B) \[\frac{2}{3}V\]

    C) \[\frac{3}{2}V\]                                

    D)  \[3V\]

    Correct Answer: B

    Solution :

    Potential inside the sphere will be same as that on its surface\[ie,\,\,V={{V}_{surface}}=\frac{q}{10}stat-volt\]                 \[{{V}_{out}}=\frac{q}{15}stat-volt\] \[\therefore \]                  \[\frac{{{V}_{out}}}{V}=\frac{2}{3}\Rightarrow {{V}_{out}}=\frac{2}{3}V\]


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