1. Is it safe to assume that the voltage across a Zener is always equal to the rated $$V_Z$$? Why/why not?
2. The instantaneous resistance (also known as AC resistance) of a diode may be approximated by taking the differences between adjacent current-voltage readings. That is, $$r_{diode} = \Delta V_{diode}/\Delta I_{diode}$$. What is the smallest effective resistance of the Zener using Table 6.5.1 (show work)?
4. Assume that a diode with a much higher $$I_{ZT}$$ rating (say, 100 mA) was used in this exercise. In general, what would the likely outcome be for the circuit of Figure 6.3.2?