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+// Calculate V_z

+// Basic Electronics

+// By Debashis De

+// First Edition, 2010

+// Dorling Kindersley Pvt. Ltd. India

+// Example 2-35 in page 112

+

+clear; clc; close;

+

+// Given data

+// (a) Proof of V_z=51/sigma has been given

+sigmai=1/45; // Intrinsic conductivity in 1/ohm-cm

+sigmap=1/3.9; // Conductivity of p material in1/ohm-cm

+I_0=6*10^-6; // Current in microA

+

+// Calculation

+Vz1=51/sigmai;

+Vz2=51/sigmap;

+I=I_0*(exp(100/26)-1);

+printf("(a)Proof of V_z=51/sigmap has been given\n");

+printf("(b)When material is intrinsic, Vz = %0.3f V\n",Vz1);

+printf("(c)When resistivity drops, Vz = %0.1f V\n",Vz2);

+printf("(d)I = %0.3e A",I);

+

+// Result

+// (a) Vz = 51/sigmap is proved

+// (b) Vz1 = 2300V

+// (c) Vz2 = 198.9V

+// (d) I = 0.274 mA
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+(a)Proof of V_z = 51/sigmap has been given

+(b)When material is intrinsic, Vz = 2295.000 V

+(c)When resistivity drops, Vz = 198.9 V

+(d)I = 2.749e-004 A 
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