An electric field converges at the origin whose magnitude is given by the expression $E = 100\,r\,Nt/Coul$, where $r$ is the distance measured from the origin.

  • A

    total charge contained in any spherical volume with its centre at origin is negative.

  • B

    total charge contained at any spherical volume, irrespective of the location of its centre, is negative.

  • C

    total charge contained in a spherical volume of radius $3\, \,cm$ with its centre at origin has magnitude $3 \times 10^{-13}\ C.$

  • D

    all of the above

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