Electrostatic Potential and Capacitance - Result Question 13
14. A hollow metal sphere of radius $10 cm$ is charged such that the potential on its surface is $80 V$. The potential at the centre of the sphere is [1994]
(a) zero
(b) $80 V$
(c) $800 V$
(d) $8 V$
Topic 2: Electric Potential Energy & Work
Done in Carrying a Charge15. The potential energy of particle in a force field is $U=\frac{A}{r^{2}}-\frac{B}{r}$, where $A$ and $B$ are positive constants and $r$ is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is :
(a) $B / 2 A$
(b) $2 A / B$
(c) $A / B$
(d) $B / A$
[2012]
Show Answer
Answer:
Correct Answer: 14. (b)
Solution:
- (b) Potential at the centre of the sphere = potential on the surface $=80 V$.
