question_answer

A hollow metal sphere of radius 5 cm is charged such that potential at its surface is 10 V. The potential at the centre of the sphere is:

A)  zero volt                                            

B)  10 V

C)  same as at point 5 cm away from the surface

D)  same as at point 10 cm away from the surface

Correct Answer: B

Solution :

                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. \[\therefore \]Potential at surface = 10 V.