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diff --git a/1223/CH3/EX3.4/Ex3_4.sce b/1223/CH3/EX3.4/Ex3_4.sce
new file mode 100755
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+++ b/1223/CH3/EX3.4/Ex3_4.sce
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+clear;
+clc;
+//Example 3.4
+Vbb=1.5;//(V)
+Rb=580;//(KOhm)
+Veb=0.6;//(V)
+Vcc=5;//(V)
+b=100;
+//writing Kirchhoff voltage law equation around E-B loop
+Ib=(Vcc-Veb-Vbb)/Rb;
+printf('\nbase current=%.3f mA\n',Ib)
+Ic=b*Ib;
+printf('\ncollector current=%.2f mA\n',Ic)
+Ie=(1+b)*Ib;
+printf('\nemitter current=%.3f mA\n',Ie)
+Vec=(1/2)*Vcc;
+printf('\nce voltage=%.2f V\n',Vec)
+Rc=(Vcc-Vec)/Ic;
+printf('\ncollector resistance=%.f KOhm\n',Rc)