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+//pagenumber 307 example 29
+clear
+beta1=500;
+ib=20*10^-6;//ampere
+re=100;//ohm
+ic=beta1*ib;
+vc=ic*0.47*10^3;//voltage drop across collector resistance
+v1=(10-vc);
+vb=v1-0.6;
+rb=vc/ib;
+disp("base resistance   =   "+string((rb))+"ohm");
+ve=re*ic;
+disp("base resistance with re");
+b=0.6+0.1;
+rb=(v1-b)/ib;
+disp("base resistance   =   "+string((rb))+"ohm");
+
+
+