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2 electricForceDetails

# 2 electricForceDetails - Craig Ogilvie Logistics Â Clicker...

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Unformatted text preview: Craig Ogilvie Logistics Â§ Clicker extra credit points start today â€“ Register clicker ID on BB home page Â§ Weekly summary (extra credit) â€“ Via BlackBoard enter your summary of the main ideas Â» By Sat 8am â€“ Provide anonymous feedback to 2 other summaries Â» By Tue 8am Craig Ogilvie 11 Craig Ogilvie Craig Ogilvie 22 Review Lecture 1 Â§ Two charge states, conventionally labeled +ve, -ve Â§ Quantify force, action-at-distance, 1st 222 lab Â§ Processes can only separate charge â€“ charge is conserved ++ ++ r r r q q F Ë† 4 1 2 2 1 Ï€Îµ = Force direction on the line between two charges Craig Ogilvie Question: Demo Â§ Charge a pith ball, with either +ve or â€“ve charge Â§ It is attracted to a large, uncharged object â€“ Why? Write an answer down yourself â€“ Share your answer with a neighbor Â§ Charges in material can slightly shift â€“ Polarizability Â§ Pith ball attracted to negative, displaced charges Craig Ogilvie 33 ++ ++- +- +- +- + Craig Ogilvie Goals Â§ Application of charge mobility â€“ Introduction to mobility (conductors, insulators) in pre-lecture video Â§ Problem-solving with Coulombâ€™s Law Â§ Introduction to electric field Craig Ogilvie 44 Craig Ogilvie Application of Mobility: charging by induction 1. Charge insulating plate 2. Bring metal disk close â€“ 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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2 electricForceDetails - Craig Ogilvie Logistics Â Clicker...

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