Lecture05_Kim

# Lecture05_Kim - Lecture 5-1 Demo Pointed Surfaces E field...

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Lecture 5-1 Demo - Pointed Surfaces Now consider a sharp point . The field lines are much closer together, i.e., the field is much stronger and looks much more like the field of a point charge. E field is always perpendicular to the surface of a charged conductor

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Lecture 5-2 Thin , uniformly charged cell (Review) E = 0 inside Discontinuity in E 2 Q Ek r outside 0 r E 
Lecture 5-3 Continuous Charge Distribution 3: Charged Disk (Review)   2 2 3/2 2 0 2 0 2 2 1 2 2 0 / 0 () 2 2 2 ( ) 1 2 1 0 1 ( / ) /2 xx R R R R whole plane and x E E dE k dq xa x k ada a kx da E kx x a kx Rx           <= Independent of x Superposition of rings! At a point P on axis: Use the ring result 2 2 3/ 2 x x dE a q k x d 2 dq ada   0 2 22 2 2 k x R E k R kQ xR 2 2 11 1 ( / ) 2 1 ( / ) x R R x  

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Lecture 5-4
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## This note was uploaded on 12/07/2011 for the course PHYS 241 taught by Professor Wei during the Fall '08 term at Purdue.

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Lecture05_Kim - Lecture 5-1 Demo Pointed Surfaces E field...

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