Q. find voltage across diode Diode equation is : I=10^-20(e^15v -1) solution: we do multiple source transformation an then write the nodal equation as 0.0005+10^-20(e^15v -1)-0.0005=0 solving by newton Rapson method numerator=(0.0005*x)+10^(-20)*(exp(15*x)-5)-00001 denominator=0.0005+ 15*(10^(-15)*(exp(20*x)) number of iteration = 8 code: x=0 temp=1; count=0; while x~=temp x=temp; num=(0.0005*x)+10^(-20)*(exp(15*x)-5)-0.0001; dem=0.0005+ 15*(10^(-15)*(exp(20*x)); temp=x-(num/dem); count=count+1; p(count)=x; end title('convergene after multiple iteration'); fprint('number of iteration='); disp(count); fprint('answer=');disp(x) code and ckt by ROHAN THAPE RAHUL YADAV