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Unformatted text preview: PHYSICS 2B PROF. HIRSCH Formulas: QUIZ 6 WINTER QUARTER 2010 MARCH 1, 2010 sin 30 o = cos 60o = 1 / 2, cos30o = sin60 o = 3 / 2, sin 45o = cos 45o = 2 / 2 r r r kq q q1q2 Coulomb's law ; k = 9 "10 9 N # m2 /C 2 ; F12 = r 1 r2 3 ( r2 " r1 ) 2 | r2 " r1 | r r kq ^ Electric field due to charge q at distance r : E = 2 r ; Force on charge Q: r 2kp E= Electric field of dipole: along dipole axis / perpendicular: E = 3 / ! x r r r r r ! Energy of and torque on dipole in E-field: U = " p # E , " = p # E F=k r r F = QE kp (p=qd) y3 ! ! Linear, surface, volume charge density : dq = ! ds , dq = " dA 2k" Electric field of infinite : line of charge : E = ! ; r ! r r q ! "= , dq = # dV ! sheet of charge : E = 2#k$ = $ /(2%0 ) 1 ; $0 = 8.85 '10(12 C 2 /Nm 2 4 &$0 Gauss law : % E # dA = enc ! ! U B " U A = #U AB = "W AB V= kq ;V= r B % % r % = - & F $ dl = - & qE $ dl = q#VAB = q(VB " VA ) B A A $0 ; " = electric flux ; k = V=...
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This note was uploaded on 03/03/2010 for the course PHYS 2b taught by Professor Schuller during the Winter '08 term at UCSD.

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