Electrostatics 3 Question 12
12. A hollow metal sphere of radius $5 \mathrm{~cm}$ is charged such that the potential on its surface is $10 \mathrm{~V}$. The potential at the centre of the sphere is
$(1983,1 \mathrm{M})$
(a) zero
(b) $10 \mathrm{~V}$
(c) same as at a point $5 \mathrm{~cm}$ away from the surface
(d) same as at a point $25 \mathrm{~cm}$ away from the surface
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Answer:
Correct Answer: 12. (b)
Solution:
- Electric potential at any point inside a hollow metallic sphere is constant. Therefore, if potential at surface is $10 \mathrm{~V}$, potential at centre will also be $10 \mathrm{~V}$.
