Lecture%206%202220%20Spring%202009

Lecture%206%202220%20Spring%202009 - Physics 2220...

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1 Physics 2220 Announcements: HW 4 is due Friday. HW 5 will be posted today and is due next Tuesday Help room (Physics 117) hours: Monday 4-8 pm Tuesday and Wednesday 3-6:30 pm Thursday 4:30-8 pm Friday 2-6 pm Turn in a piece of paper with name and responses if you don’t have your clicker with you today, or if you haven’t given me your clicker ID yet Electrostatic Equilibrium • When there is no net motion of charge within a conductor, the conductor is said to be in electrostatic equilibrium to be in Properties of a Conductor in Electrostatic Equilibrium • The electric field is zero everywhere inside the conductor • If an isolated conductor carries a charge, the charge resides on its surfac charge resides on its surface • The electric field just outside a charged conductor is perpendicular to the surface and has a magnitude of σ / ε o • On an irregularly shaped conductor, the surface charge density is greatest at locations where the radius of curvature is the smallest Property 1: E inside = 0 • Before the external field is applied, free electrons are distributed throughout the conductor • When the external field is applied, the
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Lecture%206%202220%20Spring%202009 - Physics 2220...

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