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//Chapter 5, Example 5.1
clc
//Initialisation'
i=5 //current in amp
r=100*10**-3 //radius in meter
pi=3.14 //pi
//Calculation
l=2*pi*r //circumference
h=i/l //magnetic field strength
//Results
printf("Magnetic field strength, H = %.2f A/m",h)
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