lect2 - hysics 202, Lecture 2 Physics 202, Lecture 2 odays...

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Unformatted text preview: hysics 202, Lecture 2 Physics 202, Lecture 2 odays Topics Today s Topics lectric Force and Electric Fields Electric Force and Electric Fields Electric Charges and Electric Forces Coulomb's Law Physical Field The Electric Field Electric Field Lines Motion of Charged Particle in Electric Field A Reminder Lectures supplement but do not substitute for reading ! Lecture Effectiveness = Preview + Lectures + Review Properties of Electric Charges 2+1 types: positive, negative (+neutral). Unit: Coulomb (C). 1 C= charge of 6.24x10 18 protons. Electric charge is quantized: q= N e, e =1.602x10-19 C Building blocks of matters: harge (C) ass (kg) Charge (C) Mass (kg) Electron- e =- 1.602x10-19 9.11x10-31 roton = 602x10-19 673x10-27 lectric charge is conserved: charges can be moved Proton + e + 1.602x10 1.673x10 Neutron 1.675x10-27 Electric charge is conserved: charges can be moved around, but the total charge remains the same. For deep thinkers: Why electrons and protons have the same electric charge? Electric Force And Coulombs Law Electric forces exist between two charged particles The direction of electric force depends on the signs of e charges: the charges: forces between opposite sign charges are attractive forces between like sign charges are repulsive...
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lect2 - hysics 202, Lecture 2 Physics 202, Lecture 2 odays...

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