Xcos examples from textbooks and for blocksHEADmaster

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diff --git a/Working_Examples/154/CH2/EX2.2/ch2_2.sce b/Working_Examples/154/CH2/EX2.2/ch2_2.sce
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+clc
+disp("Example 2.2")
+printf("\n")
+printf("Given")
+disp("Inductance used is 30mH")
+disp("Current flow is i=10*sin(50*t)")
+L=30*10^-3;iamp=10;
+t=0:0.01:0.06283;
+i=10*sin(50*t)
+//v=L*d/dt(i)
+//d/dt(sin 50t)=50*cos t
+vamp=L*iamp*50;
+v=vamp*cos(50*t)
+
+//sinA*cosB=(sin(A+B)+sin(A-B))/2
+
+pamp=vamp*iamp/2;
+p=pamp*sin(100*t)
+//On integrating 'p' w.r.t  t
+
+wL=0.75*(1-cos(100*t));
+
+
+subplot(221)
+plot(t,i)
+xtitle ('i vs wt','wt','i');
+
+subplot(222)
+plot(t,v)
+xtitle ('v vs wt','wt','v ');
+
+subplot(223)
+plot(t,p)
+xtitle ('p vs wt','wt','p ');
+
+subplot(224)
+plot(t,wL)
+xtitle ('wL vs wt','wt','wL ');
+
+
+