# lecture10 - 1 Electric Potential(III Text sections 25.5...

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Unformatted text preview: 1 Electric Potential (III) Text sections 25.5, 25.6 Fields, potential, and conductors Practice: Chapter 25, problems 34, 37, 38, 43, 61, 64 Read page 729, Van de Graaff generator Potential and Continuous Charge Distributions Potential and Continuous Charge Distributions We can use two completely different methods: 1. 2. Find from Gauss’s Law, then… , r dq k dV e = ∫ = source e r dq k V E r , s d E dV r r •- = ∫ •- =- B A A B s d E V V r r 2 Example: Thin Uniformly Charged Rod Example: Thin Uniformly Charged Rod L + + + + + + + + + + + + + + + + + O b Total charge Q, uniform linear charge density λ L Q = λ (So ) Find : V at point O Example: Charged Semicircle Example: Charged Semicircle + + + + + + + + + + R dq Total charge Q, uniform Find : V at centre C (Homework exercise: review the calculation for the electric field E , which is harder.) C 3 1) Find the electric field as a function of r using Gauss’s Law....
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lecture10 - 1 Electric Potential(III Text sections 25.5...

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