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+clc;clear;
+//Example 18.8
+//calculation of Hall voltage
+
+//given values
+ND=10^21;//donor density per m^3
+B=.5;//magnetic field in T
+J=500;//current density in A/m^2
+w=3*10^-3;//width in m
+e=1.6*10^-19;//charge in C
+
+//calculation
+
+
+V=B*J*w/(ND*e);//in volts
+disp(V*10^3,'Hall voltage in mv is');
+\ No newline at end of file