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+//Ex 2.12 page 74
+
+clc;
+clear;
+close;
+
+VS=300;// V
+delta_i = 50/1000;// A
+R=60;// ohm
+L=2;// H
+TP=40*10**-6;// s
+
+I1=VS/L*TP;// A (at the end of pulse)
+// as I1 << delta_i
+I2=delta_i;// A (anode current with RL load)
+
+Rdash = VS/(I2-I1)/1000;// kohm
+printf('Value of resistance = %.2f kohm',Rdash)
+