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diff --git a/1787/CH2/EX2.19/Exa2_19.sce b/1787/CH2/EX2.19/Exa2_19.sce
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+//Exa 2.19
+clc;
+clear;
+close;
+//given data
+e=1.6*10^-19;//in coulamb
+ND=10^21;//in m^-3
+Bz=0.2;//in T
+d=4;//in mm
+d=d*10^-3;//in meter
+J=600;//in A/m^2
+n=ND;//in m^-3
+//formula : VH*w/(B*I)=1/(n*e)
+VH=Bz*J*d/(n*e);//in V
+disp(VH*10^3,"Magnitude of hall voltage in mV : ");
+\ No newline at end of file