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clear//
//
//
//Variable declaration
Tc=7.18; //temperature(K)
H0=6.5*10**4; //critical field(T)
T=4.2; //temperature(K)
d=1*10**-3; //diameter(m)
//Calculation
Hc=H0*(1-(T/Tc)**2); //critical field(T)
ic=%pi*d*Hc; //critical current(A)
//Result
printf("\n critical current is %0.2f A",ic)
printf("\n answer given in the book is wrong")
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