V = I L ′ v + L ′ x d I d t + I R ′ x = I ( L ′ v + R ′ x ) + L ′ x d I d t displaystyle V=IL'v+L'x frac mathrm d I mathrm d t +IR'x=Ileft(L'v+R'xappropriate)+L'x frac http://charliewhpxf.blogproducer.com/232214/what-does-raingun-mean