Electric Fields Review Coulomb’s Law Review Electric Fields Multiple-charge Electric Fields...

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Transcript of Electric Fields Review Coulomb’s Law Review Electric Fields Multiple-charge Electric Fields...

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Electric FieldsReview Coulombs LawReview Electric FieldsMultiple-charge Electric FieldsContinuous-charge Electric FieldsParallel Plate FieldsParallel Plate ExamplesGausss Law

Malaysian searchEstimate radius from satellite signal strength Heading?? ()???http://m.washingtonpost.com/blogs/worldviews/wp/2014/03/15/possible-paths-for-missing-malaysia-airlines-flight/?tid=HP_more

http://www.washingtonpost.com/national/health-science/satellite-locates-malaysian-flight-370-still-flying-seven-hours-after-takeoff/2014/03/15/96627a24-ac86-11e3-a06a-e3230a43d6cb_graphic.html

Coulombs LawFundamental property chargePositive and negative chargeUnits Coulombs (C)Force LawCompare with gravitationFundamental property massPositive mass onlyUnits kilograms (kg)Force Law

Field concept - Gravity

Field concept - ElectricalCellphone signalMultiple users sharing same tower.Why calculate each phone separately?2 step process 1. Calculate common field.2. Calculate each phones interaction with that field.Field equals # of bars you have!

Electrostatic vs. Gravitational Field7Electric Field Animation2-D animation

https://ef55311d-a-62cb3a1a-s-sites.googlegroups.com/site/physicsflash/Efield.swf?attachauth=ANoY7crCoduqPW1yrSvMtvv2qNVfA62NqyoNF1X8FY1ldipscty_-KXPmxmMyKYNdrruNd8vROoqOCxqee-i4LdS8Ct27vHfViZ597w8ETuqbnejUPkP7AiKqr4M-S3qn2VLzO2dQNl_KXv-Re0jQ5puGFnzKrPwZvuy0UkMwMU4QhXhJIIX4jWlWsQhQdgzqz-f17N3xQOXvEvfeWC1O-3ObHX89WV72w%3D%3D&attredirects=1

Electric Field - Example 16-9 (1)Get magnitudes

9Electric Field - Example 16-9 (2)XY table

FieldX-componentY-componentE20 N/C+5 x 106 N/CE1+1.1 x 106 N/C-0.625 x 106 N/CTotal+1.1 x 106 N/C+4.375 x 106 N/C10Electric Field Problem 16Charge square

Continuous charge distributionsCoulombs Law plus a lot of integral calculus!(dont worry, Ill just show results)Field of line of chargeField of ring of chargeField of sheet of chargeField between 2 sheets of charge

121- Field of Line of Charge

132 Field of Ring of Charge

143 Field of Sheet of Charge

15Continuous charge distributions - Summary

164 Field between 2 Sheets of Charge

Field between 2 Sheets of ChargeExample - Photocopy Field

19Examples

Examples

Field Lines

22Gausss Law

Gausss Law ExamplesPoint chargeLine of chargeSheet of charge24Gausss Law 1 Point charge

Gausss Law 2 Line charge

Gausss Law 3 Sheet charge