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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2010

  • question_answer
    A conducting sphere of radius R, and carrying a charge q is joined to a conducting sphere of radius 2R, and carrying a charge - 2q. The charge flowing between them will be

    A)  \[-\frac{q}{3}\]                                

    B)  \[\frac{2q}{3}\]

    C)  \[q\]                    

    D)         \[\frac{4q}{3}\]

    Correct Answer: A

    Solution :

    Initial charge on sphere of radius\[R=q\] Charge on this sphere after joining                 \[q=\frac{[q+(-2q)]\times R}{R+2R}=\frac{-q\times R}{3R}=-\frac{q}{3}\]


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