differentiantion calculation in numerical methods az50 m JSo

differentiantion calculation in numerical methods

a.z=50 m J=?

J=-sigma *dV/dz

Jdz= -sigma*dV

integrating both sides we get

J*z= -sigma*V +c

now ,1st puting values of sigma ,z and V to calculate c and then to calculate J

J*25= -10*30 +c *45/25
J*45= -10*60+c
J*80= -10*100+c

45J*25= -300*45/25 +45/25c
J*45= -10*60+c

substracting 1 from 2

0=60 +0.8c
c= -75 SV/m

using
J*25= -10*30 -75SV/m = -375SV/m= -15SV/m