Q. The electric field at a distance 3R/2 from the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance R/2 from the centre of the sphere is
A) Zero
B) E
C) E/2
D) E/3
Explanation
[Solution from source] All the charge of a conducting shell sits on its surface, and by Gauss's law the enclosed charge for any point inside (r = R/2) is zero, so the field there is zero. The value E at 3R/2 only describes points outside the shell and does not scale down inside. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.