lect2 - hysics 202 Lecture 2 Physics 202 Lecture 2 oday’s...

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Unformatted text preview: hysics 202, Lecture 2 Physics 202, Lecture 2 oday’s 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 Coulomb’s 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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This note was uploaded on 02/07/2011 for the course PHYS 202 taught by Professor Everett during the Spring '08 term at University of Wisconsin.

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lect2 - hysics 202 Lecture 2 Physics 202 Lecture 2 oday’s...

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