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//Variable declaration
r=0.052*10**-9; //radius(m)
B=3; //flux density(Wb/m**2)
e=1.6*10**-19;
m=9.1*10**-31; //mass(kg)
//Calculation
delta_mew=e**2*r**2*B/(4*m); //change in magnetic moment(A m**2)
//Result
printf('change in magnetic moment is %0.3f *10**-29 Am**2 \n',(delta_mew*10**29))
printf('answer given in the book is wrong\n')
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