In each ease shown at right, the solid sphere has radius a and a total charge +Q

Question

In each ease shown at right, the solid sphere has radius a and a total charge +Q. However, the sphere in case A is an insulator with its charge uniformly distributed throughout its volume, and the sphere in case B is a conductor. Consider the statements below about the electric potential at points P and S in the two cases. Alex: The electric potential at point S will be the same for the two cases because the charges of the spheres are the same. Likewise, the electric potential at P will be the same." Brooke: "The electric potential at S will be different in the two cases because one is a conductor while the other is an insulator. The electric potential at P will be the same because they have the same charge." Christina: "The electric potential at both points S and P will be different because one is a conductor while the other is an insulator. Which of these students is correct? Alex Brooke Christina None of these students Explain.

Explanation / Answer

I can't see where is the point S. but at point P Potential is different for both the case because in the case of conductor all the charges will goes to surface but in case of insulator charges will remain intact at their position.

So According to that Christina is correct.

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