BIO120H1 Lecture Notes - Electric Potential Energy, Electric Field, Robert Andrews Millikan
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BIO120H1 Full Course Notes
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Electric potential and potential energy due to point charges. Obtaining the value of the electric field from the electric potential. * an asterisk indicates a question or problem new to this edition. Taken without reference to any other point, the potential could have any value. The potential is decreasing toward the bottom of the page, so the electric field is downward. The two spheres come to the same potential, so q/r is the same for both. If charge q moves from a to b, we find the charge on b: Sphere a has charge 450 nc 300 nc = 150 nc. (ii) answer (a). Contact between conductors allows all charge to flow to the exterior surface of sphere b. Ranking a > b = d > c. the potential energy of a system of two charges is. The potential energies are: (a) (b) (c) (d) The particle feels an electric force in the negative x direction.
