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diff --git a/165/CH4/EX4.25/ex4_25.sce b/165/CH4/EX4.25/ex4_25.sce
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+//Example 4.25
+close;
+clc;
+
+V=3;                  //in volts
+Rm=50;                //In ohms
+Rh=10;                //in ohms
+Im=10*10^-3;          //in amperes
+Ih=0.5*Im;            //Half scale definition
+Vm=Ih*Rm;             //Voltage across the movement
+//Voltage across unknown resitence =Voltage across meter movement
+Ix=Vm/Rh;             //Current through unknown resistence
+Ish=Ix-Im/2;          //Current through shunt
+Rsh=Vm/Ish;           //Shunt resistence
+printf('\nValue of Shunt resistence Rs = %.2f ohm\n',Rsh)
+//Calculation of R1
+It=Ix+Im/2+Ish;       //Total battery current
+V_drop=V-Vm;          //Voltage drop across limiting resistor
+R1=V_drop/It;
+printf('Value of limiting resistence R1 = %.2f ohm\n',R1)
+\ No newline at end of file