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clc
//to calculate conduction current and displacement current densities
sigma=10^-3 //conductivity in mhos/m
E=4*10^-6 //where E=4*10^-6*sin(9*10^9t) v/m
J=sigma*E
disp("conduction current density is J="+string(J)+"sin(9*10^9t) A/m")
epsilon0=8.85*10^-12 //permittivity in free space
epsilonr=2.45 //relative permittivity
//formula is epsilon0*epsilonr*(delE/delt)
//delE/delt=4*10^-6*9*10^9*cos(9*10^9*t)
Jd=epsilon0*epsilonr*4*10^-6*9*10^9
disp("displacement current density is Jd="+string(Jd)+"cos(9*10^9*t) A/m^2")
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