Q. A hollow metal sphere of radius 5 cm is charged such that potential at its surface is 10V. The potential at the centre of the sphere is
A) Zero
B) 10 V
C) Same as at point 5cm away from the surface
D) Same as at point 10cm away from the surface
Explanation
(b) Electric field inside a spherical charge is everywhere zero, hence, inside a spherical charge the potential at all points is the same and its value is equal
to that on the surface.
∴ Potential at surface=10V.
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.