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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex4_22.sce.
+
+clc;
+clear;
+V=2.5;                //potential difference of the plates in kv
+x=0.25;               //distance between two parallel plates in cm
+x1=0.02;              //airgap in between the parallel plates in cm
+x2=0.23;             //thickness of fibre sheet in the gap in cm
+epsilon_r=5;
+
+//As the eletric displacement is perpendicular to the boundary
+//D=D1=D2;  ,   D1=epsilon_not*E1;         ,   D2=epsilon_not*epsilon_r*E2;
+//from this E1=5*E2;
+
+//V=V1+V2;       V1=x1*E1;        V2=x2*E2;
+//from this we can find the equation of E2
+
+E2=V/((x1*epsilon_r)+(x2));
+E1=5*E2;
+
+printf("\n Electric field strength in air , E1=%2.2f kV/cm \n",E1)
+printf("\n Electric field strength in the fibre , E2=%1.3f kV/cm \n",E2)
+
+E=30;          //Dielectric strength of air in kV/cm
+if (E1>E) 
+     printf("\n The air will break.")
+else
+    printf("\n The air will not break.")
+end