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+
+//=====================================================================================
+//Chapter 12 example 21
+
+clc;clear all;
+
+//variable declaration
+M1    = 15.9;		//mutual inductance in mH
+M2    = 0.1;			//mutual inductance in mH
+r1      = 25.9;		//resistance   in  Ω
+r2      = 12.63;		//resistance   in  Ω
+
+//calculations
+L1     = 2*(M1-M2);		//self inductance in mH
+R1    = r1-r2;		//resistance   in  Ω
+
+//result
+mprintf("self inductance = %3.2f mH",L1);
+mprintf("\nresistance = %3.2f Ω",R1);