1. Draw and explain the atomic structure of Gallium Arsenide (GaAs)? 2. Explain the working of Zener diode with neat diagram. Determine the diode current (I) for the circuit shown below. Assume D1 is silicon and D2 is germanium. D₁ 2 ΚΩ www R 24V D₂ 3. Determine the voltage across R3 (V) and current (I) for the circuit shown below. All the diodes are made up of Silicon. R1 100 02 ww R2 180C R3 1500 04 4. Draw and explain the working of Full Wave Bridge Rectifier? 5. Draw the circuit diagram using diode and write the truth table of a logic gates whose output will be the logical OR operation of three inputs.

Fig: 1