4. A certain amount of excess charge is transferred a conducting sphere with a diameter of 30 cm such that the electric potential at the center of the sphere is equal to 2.5 kV. a. How much charge was...

Extracted text: 4. A certain amount of excess charge is transferred a conducting sphere with a diameter of 30 cm such that the electric potential at the center of the sphere is equal to 2.5 kV. a. How much charge was transferred to the conducting sphere? b. Determine the electric potential at a point outside of the sphere with a distance of 5 cm from its surface. c. Determine the charge density of the sphere. (Hint: surface or volume?)