Zener Diode (Regulator) — Practice Quiz

Question 1

A Zener diode is used as a voltage regulator. It operates in:

Accepted Answer

Reverse bias breakdown region

Answer

Forward bias

Answer

Cutoff

Answer

Open circuit

Question 2

If V_in = 15 V, V_Z = 9 V, R_S = 100 Ω, and load draws 30 mA, Zener current is:

Accepted Answer

30 mA

Answer

60 mA

Answer

90 mA

Answer

300 mA

Question 3

A Zener diode connected without a series resistor (just across a battery > V_Z) will:

Accepted Answer

Carry excessive current and burn out

Answer

Regulate normally

Answer

Block the current

Answer

Behave like ordinary diode

Question 4

Zener breakdown is the dominant mechanism for V_Z:

Accepted Answer

< 5 V

Answer

> 10 V

Answer

Exactly 6 V

Answer

Any voltage

Question 5

Power dissipated in a Zener at V_Z = 5.6 V and I_Z = 50 mA:

Accepted Answer

0.28 W

Answer

28 mW

Answer

112 mW

Answer

0.0056 W