Two uniformly charged spherical conductors $A$ and $B$ of radii $5 \mathrm{mm}$ and $10 \mathrm{mm}$ are separated by a distance of $2 \mathrm{cm}$. If the spheres are connected by a conducting wire, then in equilibrium condition, the ratio of the magnitudes of the electric fields at the surface of the sphere $A$ and $B$ will be

• A

  $1:2$
• Correct answer
  B

  $2:1$
• C

  $1:1$
• D

  $1:4$

Hence, the correct answer is option: 'B'.