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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex2_5.sce.
+
+clc;
+clear;
+R1=10;
+R2=30;
+R3=15;
+R4=45;
+
+a1=3;b1=-1;c1=-9;                                   //these are the coefficient values of VA,VB and the source obtained from node A in the given circuit
+a2=-3;b2=4;c2=-27;                                  //these are the coefficient values of VA,VB  and the source obtained from node B in the given circuit
+del=det([a1 b1;a2 b2]);
+del1=det([c1 b1;c2 b2]);
+del2=det([a1 c1;a2 c2]);
+
+VA=del1/del;                                  //Using Cramer's rule
+VB=del2/del;                                 //Using Cramer's rule
+Vba=VA-VB;
+I2=VA/R2;                                    // from Ohm's law
+printf("\n  Vba=%d V \n",Vba)
+printf("\n  Current through the 30 ohm resistor=%1.4f A \n",I2)