4. Electric field due to a uniformly charged hollow sphere at a distance of r (where r is greater than the radius of the sphere) is __________ a) Proportional to r b) Inversely proportional to r c) Proportional to r2 d) Inversely proportional to r2
Answer: d Explanation: If the total charge of the sphere is q then the electric field at a distance of r is equal to q4πεor2.Therefore the electric field is proportional is 1r2 (if r > radius of the sphere). But if r < radius of the sphere the electric field will be zero i.e. electric field inside a hollow sphere is always zero.
