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//Variable declaration
e=1.6*10**-19;
Eg=0.72; //band gap(eV)
k=1.38*10**-23; //boltzmann constant
T1=293; //temperature(K)
T2=313; //temperature(K)
sigma1=2; //conductivity(mho m-1)
//Calculation
x=(Eg*e/(2*k))*((1/T1)-(1/T2));
y=(x/2.303);
z=(log10(sigma1));
log_sigma2=y+z;
sigma2=10**log_sigma2; //conductivity(mho m-1)
//Result
printf('conductivity is %0.3f mho m-1 \n',(sigma2))
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