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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

1. zero
2. 80 V
3. 8 V
4. 800 V

Correct answer: 80 V

Solution

For a charged conductor, the electric potential is constant throughout its surface and inside the conductor. Hence, the potential at the center of the sphere is the same as on its surface, which is 80 V.

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