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//chapter10,Example10_4,pg 272
vx=1.7*10^7
Ey=3.4*10^4
x=3*10^-2
t=x/vx
//y=0.5*ay*(t^2)
ay=(e*Ey)/m
y=0.5*ay*(t^2)
Bz=Ey/vx
printf("verical displacement of electron \n")
printf("y=%.2f m",y)
printf("\nmagnitude of magnetic field\n")
printf("B=%.4f wb/m2",B)
printf("\ndirection of field is upward as Ey is downward")
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