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+clc;clear;
+//Example 4.7
+//electric and magnetic fields in crossed configuration
+//given values
+B=2*10^-3;//magnetic field in wb/m^2
+E=3.4*10^4;//electric field in V/m
+m=9.1*10^-31;//in kg
+e=1.6*10^-19;//in C
+v=E/B;//in m/s
+disp(v,'electron speed is:')
+R=m*v/(e*B);//in m
+disp(R,'radius of circular path (in m) when electric field is switched off')
+\ No newline at end of file