Need additional help? Then visit the Physics Learning Center located in 228 Fisher. VC (parallel plate capacitor) d 1 q point charge V= 4 0 r V =i
U dipole = p E = pE cos U q +sources = qV V = Es E= V= U q +sources q The Electric PotentialU elect = U 0 + qEs (parallel-plate capacitor) U q1 + q2 = 1 q1q2 4 0 r U elect = i< jġ 2 E =, perpendicular to line 4 0 r Uniform infinite plane of charge: E =, perpendicular to plane 2 0 Uniformly charged sphere: Q E= r for r R 4 0 r 2 (series) C1 C2 C3 2 Q 1 2 = C ( VC ) UC = uE = 0 E 2 2C 2 2Current and Conductivity1Įlectric dipole: p -q + +qs p = ( qs, from negative to positive )Į = E A = EAcos constant field e = e =surfaceĮ at surface of a charged conductor: Esurface = 0 perpendicular to surfaceįield in bisecting plane E = Q L Q surface charge density : = A Q volume charge density : = V Uniform infinite line of charge: linear charge density : =Įlectron current: i = rate of electron flow N e = it i = nAvd e E m Conventional current: I = rate of charge flow = ei vd = Q = I t Current density: J =I/A J = nevd = E W Vbat = chem = E (ideal battery) q Q C= C = C0 VC C= (parallel-plate capacitor) d Ceq = C1 + C2 + C3 +.
= the negative of the "area" Es = Vloop dV ds = ( V ) i = 0i K q1 q2 F1 on 2 = F2 on 1 = r2 q = ( N p Ne ) e E = Fon q / q Fon B = qB E E= q r point charge 4 0 r 2 1 Formula SheetParallel-plate capacitor: E =, from positive to negative 0 1 ( Ering ) z = 4 2 zQ2 3/2 0 (z + R )Potential and Field
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