Two conducting spheres that carry equal charges are very far from each other and

Question

Two conducting spheres that carry equal charges are very far from each other and from all other charges. One of these spheres has twice the radius of the other one. If the potential of the smaller sphere (relative to infinity) is 100 V, the potential of the larger sphere (relative to infinity) is?

Two conducting spherical shells are concentric, with radii of 0.30 m and 1.70 m. The electric potential of the inner shell, with respect to the outer shell, is +730 V. The electric potential at a point between the shells is +480 V with respect to the outer shell. An electron is projected radially outward from this point with an initial
kinetic energy of 200 eV. The kinetic energy of the electron as it reaches either shell is?

Explanation / Answer

(a) potential due to conducting sphere V = 1/40 (q/r) ...... (1) if the potential due to small sphere is 100 V if the distance is twice the the potential is halved. so the potential due to large one is 50 V . ** post each post as seperate.

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