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clc
clear
//INPUT DATA
Ix=1 //current in first wire
Iy=1 //current in second wire
FbyL=2*10^-7 //according to the definition of ampere
a=1 //distance between the wires
//calculation
m=(2*%pi*a*FbyL)/(Ix*Iy)
//output
printf("the permeability of free space is %3.3e H/m ",m)
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