A conducting sphere of radius $10\, cm$ is charged $10\,\mu \,C$. Another uncharged sphere of radius $20\, cm$ is allowed to touch it for some time. After that if the sphere are separated, then surface density of charges, on the spheres will be in the ratio of

  • [AIIMS 2002]
  • A

    $1:4$

  • B

    $1:3$

  • C

    $2:1$

  • D

    $1:1$

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