P16_OhmsLaw(1)

P16_OhmsLaw(1) - ELECTRCITY The Electric Field The electric...

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Unformatted text preview: ELECTRCITY The Electric Field The electric field is the force on a small charge, divided by the charge: Electric Field Lines Slide 20-50 Field Lines The number of field lines starting (ending) on a positive (negative) charge is proportional to the magnitude of the charge. The electric field is stronger where the field lines are closer together. The Electric Field Force on a point charge in an electric field: Superposition principle for electric fields: Field Lines The electric field between two closely spaced, oppositely charged parallel plates is constant. Parallel Plate Capacitor E is uniform E = Q/ (ε A) Charge on plates is equal but opposite; of magnitude Q d must be small A area of plates Checking understanding • Which figure correctly depicts the field lines of two charges ? Electric Fields and Conductors The electric field is perpendicular to the surface of a conductor – if it were not, charges would move. Conductors and Electric Fields Slide 20-55 Checking understanding • Which figure correctly depicts the field lines of a negatively charged plate? Example...
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This note was uploaded on 02/15/2012 for the course PHYSICS 200 taught by Professor Staff during the Fall '11 term at Syracuse.

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P16_OhmsLaw(1) - ELECTRCITY The Electric Field The electric...

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