A hollow insulated conducting sphere is given a positive charge of $10\mathrm{\mu C}$. What will be the electric field at the centre of the sphere if its radius is 2 meters

• A

  Zero

• B

  $5\mathrm{\mu }{\mathrm{Cm}}^{-2}$

• C

  $20\mathrm{\mu }{\mathrm{Cm}}^{-2}$

• D

  $8\mathrm{\mu }{\mathrm{Cm}}^{-2}$