JEE Main 2025 Physics question
The electrostatic potential on the surface of uniformly charged spherical shell of radius R = 10 cm is 120 V. The potential at the centre of shell, at a distance r = 5 cm from centre, and at a distance r = 15 cm from the centre of the shell respectively, are:
Answer: (1)
Solution
For r≤R, V=kQ/R=120V (constant inside). For r=15>R, V=kQ/r = 120×(10/15)=80V.