User:Foxjwill/Equations From Wikipedia, the free encyclopedia I = d Q d t {\displaystyle I={\frac {dQ}{dt}}} I = n e A v d {\displaystyle I=neAv_{d}\,} J = I A {\displaystyle J={\frac {I}{A}}} J = n e v d {\displaystyle J=nev_{d}\,} ρ = E J {\displaystyle \rho ={\frac {E}{J}}} Q = N e = n e A L {\displaystyle Q=Ne=neAL\,} R = ρ L A {\displaystyle R={\frac {\rho L}{A}}} Related Articles