Question

the cathode of a zener diode in a voltage regulator is normally
select one:
o a. grounded
o b. more negative than the anode
o c. at 10.7 v
o d. more positive than the anode

Explanation:

In a voltage regulator using a Zener diode, the Zener diode operates in reverse breakdown. For reverse breakdown, the cathode (positive terminal for reverse bias) must be more positive than the anode (negative terminal for reverse bias). Option a is incorrect as the cathode isn't normally grounded. Option b is wrong because in reverse bias (Zener operation), cathode is more positive, not negative. Option c (10.7 V) is specific to certain diodes (like some signal diodes) but not a general rule for Zener in regulators. So the correct choice is d.

Answer:

d. more positive than the anode