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+//===========================================================================
+//chapter 6 example 8
+clc;clear all;
+
+
+//variable decalaration
+Rm       = 5;		//coil resistance in Ω
+Rm1       = 0.00075;		//coil resistance in Ω
+Im        = 0.015;		//full-scale defelction current in A
+I           = 100; 		//current to be measured in A
+T1        =  0.004;		//temperature coeficient of copper in Ω/Ω/°C
+T2        =  0.00015;		//temperature coeficient of manganin in Ω/Ω/°C
+T          =10; 		//rise in temperature in °C
+
+//calculations
+N       = I/(Im);		//multiplying power of shunt
+Rs     = Rm/(N-1);	//resistance of manganin shunt in Ω
+Rc     = Rm*(1+(T1*T));	//coil resitance with 10°C in temperature in Ω
+Rsh    = Rm1*(1+(T2*T));	//shunt resitance with 10°C in temperature in Ω
+In      = (Rsh/((Rc+Rsh)))*100;	//new instrument current in A
+r        = (In/(Im))*100;		//new instrument reading in A
+e       = ((r-I)/(I))*100;		//percentage error in %
+
+
+//result
+mprintf('percentage error %3.3f percentage",e);
+