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+//Tested on Windows 7 Ultimate 32-bit
+//Chapter 3 Semiconductor Diodes and Miscellaneous Devices Pg no. 96
+clear;
+clc;
+
+//Given Data
+//From Figure 3.27
+
+V=15;//value of voltage source in volts
+Vz=12;//zener breakdown voltage in volts
+R=390;//series resistance in ohms
+rz=10;//diode resistance in ohms
+Izmax=10;//maximum zener current in milli-amperes
+
+//Solution
+
+//Assuming ideal diode Vz=12V and Rz=0 ohms
+Vr=V-Vz;//voltage across resistor in volts
+Iz=Vr/(R+rz)*1000;//current through circuit in milli-amperes
+
+if Iz<Izmax then
+    printf("The diode is properly biased.\n");
+else printf("The diode is not biased properly.\n");
+end
+
+Pz=Vz*Iz;//power dissipation in milli-watts
+
+printf("The dissipated power = Pz = %d mW",Pz);