Describe the characteristics of a Zener diode with respect to its terminals, biasing, currents and voltages. Compare the behaviour of a Zener diode with an ideal device, such as a resistor, capacitor or inductor. b) LAB EXERCISE: I. Using a 'constant voltage 'model for the Zener region, calculate the output voltage of the regulator (Vo) as a function of its output current (Io). II. Simulate the circuit with RL using the potentiometer as a parameter with range of 500ohm to 1K ohm. Measure the load current and load voltage. Then vary the potentiometer resistance and measure the load voltage for a range of load currents. Plot Vo Versus Io. Evaluate the application of actual testing with these simulated results by comparing them with the theoretical / expected results. Give at least one reason for any difference with each comparison and justify all comments made, via proper referencing and research