2 electricForceDetails

2 electricForceDetails - Craig Ogilvie Logistics Clicker...

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Unformatted text preview: Craig Ogilvie Logistics Clicker extra credit points start today Register clicker ID on BB home page Weekly summary (extra credit) Via BlackBoard enter your summary of the main ideas By Sat 8am Provide anonymous feedback to 2 other summaries By Tue 8am Craig Ogilvie 11 Craig Ogilvie Craig Ogilvie 22 Review Lecture 1 Two charge states, conventionally labeled +ve, -ve Quantify force, action-at-distance, 1st 222 lab Processes can only separate charge charge is conserved ++ ++ r r r q q F 4 1 2 2 1 = Force direction on the line between two charges Craig Ogilvie Question: Demo Charge a pith ball, with either +ve or ve charge It is attracted to a large, uncharged object Why? Write an answer down yourself Share your answer with a neighbor Charges in material can slightly shift Polarizability Pith ball attracted to negative, displaced charges Craig Ogilvie 33 ++ ++- +- +- +- + Craig Ogilvie Goals Application of charge mobility Introduction to mobility (conductors, insulators) in pre-lecture video Problem-solving with Coulombs Law Introduction to electric field Craig Ogilvie 44 Craig Ogilvie Application of Mobility: charging by induction 1. Charge insulating plate 2. Bring metal disk close Mobile charges move 3. Provide path for charges on top of plate to go to ground 4. Remove metal disk 5. No change to insulating plate Craig Ogilvie 55 O bj1 0 1 Craig Ogilvie...
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This note was uploaded on 09/20/2011 for the course PHYS 222 taught by Professor Johnson during the Spring '07 term at Iowa State.

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2 electricForceDetails - Craig Ogilvie Logistics Clicker...

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