Hi dear. I am a newbie in Julia. I wanted to solve two first differential equations as

di/dt=-(R/L)i-(1/L)*v+(1/L)a

dv/dt=(1/C)i

with Julia which R,L, C is constant and the variable is i(t) and v(t).

I used the function Lorenz!(du,u,p,t) but plot is a sinusoidal waves, while it should be a damed sinusoidal wave

This is my Code:

using Plots

using DifferentialEquations

R=0.1;

L=0.01

C=0.001;

a=1;

function lorenz!(du,u,p)

du[1]=-(R/L)*u[1]-(1/L)*u[2]+(1/L)*a;

du[2]=(1/C)*u[1];

end

u0=[0,0];

tspan = (0.0,100)

prob = ODEProblem(lorenz!,u0,tspan)

sol = solve(prob)

gr()

plot(sol,vars=(0,1))