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Two concentric spheres of radii R and 2R...

Two concentric spheres of radii `R` and `2R` are charged. The inner sphere has a charge if `1muC` and the outer sphere has a charge of `2muC` of the same sigh. The potential is `9000 V` at a distance `3R` from the common centre. The value of R is

Answer

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Knowledge Check

  • A conducting sphere of radius r has a charge . Then .

    A
    the charge is uniformly distributed over its surface if there is an external electric field .
    B
    Distribution of charge over its surface will be non uniform if no external electric field exist in space,
    C
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  • two metal spheres of radii R_(1) and R_(2) are charged to the same potential. The ratio of charges on the spheres is

    A
    `sqrt(R_(1)) : sqrt(R_(2))`
    B
    `R_(1) : R_(2)`
    C
    `R_(1)^(2) : R_(2)^(2)`
    D
    `R_(1)^(3) : R_(2)^(3)`

  • There are two concentric hollow conducting spherical shells of radii r and R ( R gt r) . The charge on the outer shell is Q. What charge should be given to the inner shell, so that the potential at a point P , at a distance 2R from the common centre is zero ?

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