1.

Let rho (r ) = (Q r)/(pi R^(4)) be the charge density distribution for a solid sphere of radius R and total charge Q. For a point P inside the sphere at a distance r_(1) from the centre of the sphere, the magnitude of electric field is

Answer»

`(Q)/(4pi in_(0) r_(1)^(2))`
`(Q r_(1)^(2))/(4pi in_(0)R^(4))`
`(Q r_(1)^(2))/(3n PI in_(0) R^(4))`
zero

Answer :C


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