# Electrictiy

 The flashcards below were created by user Anonymous on FreezingBlue Flashcards. SI unit for Current Ampere (A); 1 ampere=1 coulomb per sec=1 c/s Current Density (J)=I/A=nllvd=(A/m2) Conductivity (rho) rho=nll2r/m Electron current ie=Ne/(delta) t where Ne=#electons Electron Current in Wire ie=neAvd with SI unit s-1 Electron Drift Speed vd= (e (gamma) /m) E Energy Density uE=uc/Ad=(Epsilon not)/2 x E2 units (J/m3) Dielectric- insulator inside a capacitor Kappa==(Epsilon not)/E Potential Difference w/in Dielectric (delta) Vc=((delta) Vc)0/Kappa Capacitance C=Q/(delta) Vc = (epsilon not x A) / d Charge on Capacitor Q=C delta Vo Parallel Capacitor Ceq=C1+C2+C3=... Greate than single Series Capacitor Ceq=(1/C1+1/C2+1/C3+...)-1Less than single Energy stored in capacitor Uc=Q2/2C = 1/2 C(deltaVc)2 = epsilon not/2 (Ad) E2 Capacitance Farad=F Potential Difference delta V = Vf-Vi= - (from i to f) E X ds Potential (electric field comp in s dir) Es=- dV/ds Kirchhoff's Loop-sum of all potential differences in a loop/closed path delta Vloop=sigma ( delta V)= 0 Capacitance C= Q/detla Vc=Epsilon not x A / d SI unit= farad AuthorAnonymous ID92480 Card SetElectrictiy Descriptionelectricity physics formula Updated2011-06-30T03:35:45Z Show Answers