1 files changed, 34 insertions, 0 deletions
diff --git a/2702/CH3/EX3.28/Ex_3_28.sce b/2702/CH3/EX3.28/Ex_3_28.sce
new file mode 100644
index 000000000..6cab912b7
--- /dev/null
+++ b/2702/CH3/EX3.28/Ex_3_28.sce
@@ -0,0 +1,34 @@
+// Exa 3.28
+clc;
+clear;
+close;
+// Given data 
+V_B= 0;// in V
+R_E=1*10^3;//in Ω
+R_C=1*10^3;//in Ω
+V_CC=5;// in V
+V_BE= 0.7;// in V
+V_E= V_B-V_BE;// in V
+I_E= (1+V_E)/R_E;// in A
+I_C= I_E;// (approx) in A
+V_C= V_CC-I_C*R_C;//in V
+disp("Part (i)")
+disp(V_E,"The value of V_E in volt is : ");
+disp(V_C,"The value of V_C in volt is : ");
+// For saturation 
+V_CE=0.2 ;// V
+V_CB= -0.5;// in V
+// I_C= 5-V_C/R_C and V_C= V_E-VCE, So
+// I_C= (5.2-V_E)/R_C
+// I_E= (V_E+1)/R_E and at the edge of saturation I_C=I_E,
+V_E= 4.2/2;/// in V
+V_B= V_E+0.7;// in V
+V_C= V_E+0.2;// in V
+disp("Part (ii) ")
+disp(V_E,"The value of V_E in volts is : ");
+disp(V_B,"The value of V_B in volts is : ");
+disp(V_C,"The value of V_C in volts is : ");
+
+// Note: In the book , there is a miss print in the last line of this question because V_E+0.2= 2.1+0.2 = 2.3  (not 2.8) , so answer in the book is wrong 
+
+