Q. A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :
A) increases as r increases for r < R and for r > R
B) zero as r increases for r < R, decreases as r increases for r > R
C) zero as r increases for r < R, increases as r increases for r > R
D) decreases as r increases for r < R and for r > R
Explanation
[Solution] Inside a charged conducting shell E = 0; outside $E = kQ/r^2$, which decreases with r. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.