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

• A

  ${\mathrm{A\epsilon }}_0{\mathrm{a}}^2$

• B

  $4{\mathrm{\pi \epsilon }}_0{\mathrm{Aa}}^3$

• C

  ${\mathrm{\epsilon }}_0{\mathrm{Aa}}^3$

• D

  $4{\mathrm{\pi \epsilon }}_0{\mathrm{Aa}}^2$