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
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
Explanation: If the total charge of the sphere is q then the electric field at a distance of r is equal to \(\frac {q}{4\pi\varepsilon_o r^2}\).Therefore the electric field is proportional is \(\frac {1}{r^2}\) (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.