The electric field in a certain region i...

The electric field in a certain region is acting radially outwards and is given by `E=Ar`. A charge contained in a sphere of radius `'a'` centered at the origin of the field, will given by

`4piin_0Aa^2`

`Apiin_0a^2`

`4piin_0Aa^3`

`in_0Aa^3`

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