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diff --git a/1850/CH4/EX4.1/exa_4_1.sce b/1850/CH4/EX4.1/exa_4_1.sce
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+// Exa 4.1
+clc;
+clear;
+close;
+// Given data
+Vin= 0.5;// in V
+Av= 10;
+I_B_max= 1.5;// in micro amp
+I_B_max=I_B_max*10^-6;// in A
+// Let
+I1=100*I_B_max;// in A
+R1= Vin/I1;// in ohm
+Rf= Av*R1;// in ohm
+// R2= R1 || Rf = R1 (approx.)
+R2= R1;// in ohm
+disp(I1*10^6,"Value of I1 in micro amp");
+disp(R1*10^-3,"Value of R1 in kohm");
+disp(R2*10^-3,"Value of R2 in kohm");
+disp(Rf*10^-3,"Value of Rf in kohm");
+