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+//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7 
+//Example 8.5
+//Scilab Version : 6.0.0    ; OS : Windows
+
+clc;
+clear;
+
+v=96;
+L=50*10^(-3);
+C=80*10^(-6);
+R=40;
+
+D=R/(2*L);
+w=1/(L*C)^(1/2);
+wr=(w^2-D^2)^(1/2);
+t=%pi/wr;
+
+printf('the thyristor will turned off at %f*10^3 ms',t )
+
+