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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    The radii of two metallic spheres \[P\] and \[Q\] are \[{{r}_{1}}\] and\[{{r}_{2}}\] respectively. They are given the same charge. If  \[{{r}_{1}}>{{r}_{2}}\]. then on connecting them with a thin wire, the charge will flow                                                                                              [MP PMT 1985]

    A)                    From P to Q                  

    B)                    From Q to P

    C)                    Neither the charge will flow from  P to Q nor from Q to P

    D)                    The information is incomplete

    Correct Answer: D

    Solution :

               Since charge flows from high potential to lower potential. If positive charge is given, then \[{{V}_{\text{1}}}<{{V}_{\text{2}}}\] as \[{{r}_{\text{1}}}>{{r}_{\text{2}}}\] So positive charge flows from Q ® P If negative charge is given, then \[{{V}_{\text{1}}}>{{V}_{\text{2}}}\] So negative charge flows form \[P\to Q\]. Since it is not given that whether the charge given is positive or negative, hence the information is incomplete.


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