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+//===========================================================================
+//chapter 10 example 1
+
+
+clc;
+clear all;
+
+//variable declaration
+V     = 100;        //voltmeter reading in V
+I     =0.005;       //ammeter reading in A
+S     = 1000;       //sensitivity of voltmeter in Ω per volt
+v     = 150;         //voltmeter range in V
+
+//calculations
+Rv     = S*v;           //voltmeter resistance in Ω
+Rm     = V/I;           //apparent value of unknown resistor in Ω
+y      = V/(I*Rv);
+x      = I*(1-y);
+Rx     = V/x;                   //actual value of unknown resistor in Ω
+er      = ((Rm-Rx)/Rx)*100;              //error due to loading effect of voltmeter in %
+
+//result
+mprintf("apparent value of unknown resistor = %3.2f Ω",Rm);
+mprintf("\nactual value of unknown resistor = %3.2f Ω",Rx);
+mprintf("\nerror due to loading effect of voltmeter  = %3.2f percentage",er);