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+// Exa 4.15
+clc;
+clear;
+close;
+format('v',9)
+// Given data
+Ib = 20;// in µA
+Ib = Ib * 10^-6;// in A
+I_C = 1;// in mA
+I_C = I_C * 10^-3;// in A
+Vbe = 22;// in mV
+Vbe = Vbe * 10^-3;// in V
+Vce = 0;// in V
+h_ie = Vbe/Ib;// in ohm
+h_ie = h_ie * 10^-3;// in k ohm
+disp(h_ie,"The value of h_ie in k ohm is");
+h_fe = I_C/Ib;// unit less
+disp(h_fe,"The value of h_fe is");
+Ib = 0;
+Vbe = 0.25;// in mV
+Vbe = Vbe * 10^-3;// in V
+I_C = 30;// in µA
+I_C = I_C * 10^-6;// in A
+Vce = 1;// in V
+h_re = Vbe/Vce;// unit less
+disp(h_re,"The value of h_re is");
+h_oe = I_C/Vce;// in S
+h_oe = h_oe * 10^6;// in µS
+disp(h_oe,"The value of h_oe in µS is");