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+//Ex 5.2 page 185
+
+clc;
+clear;
+close;
+
+R=5;// ohm
+Vs=300;// V
+f=1*1000;// Hz
+Ton=20;// ms
+Toff=10;// ms
+
+k= Ton/(Ton+Toff);// duty ratio
+f=1000/(Ton+Toff);//Hz
+Voav=Vs*k;// V
+Ioav=Voav/R;// A
+printf('\n duty ratio = %.3f',k)
+printf('\n chopping frequency = %.2f Hz',f)
+printf('\n Average load voltage = %.2f V', Voav)
+printf('\n Average load current = %.2f A', Ioav)