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J & K CET Medical J & K - CET Medical Solved Paper-2008

  • question_answer
    The work done in bringing at a unit positive charge from infinity distance to a point at distance X from a positive charge Q is W. Then, the potential \[^{\phi }\] at that point is

    A) \[\frac{wQ}{x}\]                                              

    B) \[w\]

    C) \[\frac{w}{Q}\]                                

    D) \[wQ\]

    Correct Answer: C

    Solution :

                     Potential at a point in a field is defined as the amount of work done in bringing a unit positive test charge, from infinity to that point along any arbitrary path, ie, \[V=\frac{W}{{{q}_{0}}}\] \[\therefore \]  \[V=\phi =\frac{W}{Q}\]                               \[[\because X<<\infty ]\]


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