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+//Chapter 4, Exmaple 2, page 140
+//Claculate electrode space
+clc
+clear
+//based on the values of example 1
+d2 = 0.01
+d1 = 0.005
+I2 = 2.7*10**-7
+I1 = 2.7*10**-8
+a = 1/(d2-d1)*log(I2/I1) // alpha
+//10^9 = %e^a(a*d) 
+//multiplying log on bith sides log(10^9) = a*d
+ad = log(10^9)
+printf("\n a*d = %f ",ad)
+d = ad/a
+printf("\n electrode space = %f m",d) 
+
+//Answers may vary due to round off error