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+clc;clear;
+//Example 4.5
+//motion of an electron in a uniform magnetic field acting at an angle
+//given values
+v=3*10^7;//electron speed
+B=.23;//magnetic field in wb/m^2
+q=45*%pi/180;//in degrees,angle in which electron enter field
+e=1.6*10^-19;//in C
+m=9.1*10^-31;//in kg
+R=m*v*sin(q)/(e*B);//in m
+disp(R,'radius of helical path is:')
+p=2*%pi*m*v*cos(q)/(e*B);//in m
+disp(p,'pitch of helical path(in m) is:')
+\ No newline at end of file