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diff --git a/1787/CH4/EX4.6/Exa4_6.sce b/1787/CH4/EX4.6/Exa4_6.sce
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+//Exa4.6
+clc;
+clear;
+close;
+//given data
+T=300;//in Kelvin
+ND=10^15;//in cm^-3
+NA=10^16;//in cm^-3
+ni=1.5*10^10;//in cm^-3
+VT=T/11600;//in Volts
+e=1.6*10^-19;//in Coulamb
+epsilon=11.7*8.854*10^-14;//constant
+Vbi=VT*log(NA*ND/ni^2);//in Volts
+SCW=sqrt((2*epsilon*Vbi/e)*(NA+ND)/(NA*ND));//in cm
+SCW=SCW*10^4;//in uMeter
+disp(SCW,"Space charge width in uMeters : ");
+xn=0.864;//in uM
+xp=0.086;//in uM
+Emax=-e*ND*xn/epsilon;//in V/cm
+disp(Emax,"At metallurgical junction, i.e for x=0 the electric field is peak i.e. Emax in volts : ");
+//Note : Ans in the book is wrong
+\ No newline at end of file