300+ TOP MCQs on Zener Diode and Answers Quiz Exam

MCQs on Zener Diode :

1. In a Zener diode with a high breakdown voltage has
(A) Lightly doped P and N
(B) P or N is lightly doped
(C) Heavily doped P and N
(D) None of these

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Answer

Answer: (A) Lightly doped P and N

2. In Zener diode, the Zener breakdown takes place
(A) Below 6 V
(B) At 6 V
(C) Above 6 V
(D) None of the above

Answer

Answer: (A) Below 6 V

3. Which of the following controls the current in a Zener diode?
(A) Zener diode resistance
(B) Potential barrier
(C) Reverse bias voltage
(D) External circuits

Answer

Answer: (D) External circuits

4. A Zener diode when biased correctly
(A) a. Never overheats
(B) b. Has a constant voltage across it
(C) c. Acts as a fixed resistance
(D) d. Has a constant current passing through it

Answer

Answer: (C) Has a constant voltage across it

5. In Zener diode, the breakdown is due to Zener, has a doping
(A) Lowest
(B) Moderate
(C) High
(D) Low

Answer

Answer: (C) High

6. In a Zener diode
(A) Negative resistance characteristic exists
(B) Forward voltage rating is high
(C) Sharp breakdown occurs at a low reverse voltage
(D) All of the above

Answer

Answer: (C) Sharp breakdown occurs at a low reverse voltage

7. A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in the figure. The current through the diode is
(A) 10 mA
(B) 15 mA
(C) 20 mA
(D) 5 mA

Answer

Answer: (D) 5 mA

8. How is the breakdown region set during the manufacturing of the diode?
(A) By controlling the size of the diode
(B) By controlling the doping of the diode
(C) By managing the biasing of diode
(D) All the above

Answer

Answer: (A) By controlling the doping of the diode

9. Depletion region behaves as
(A) Semiconductor
(B) Insulator
(C) Conductor
(D) High resistance

Answer

Answer: (B) Insulator

10. Depletion region contains
(A) Free holes
(B) Free electrons
(C) Immobile charge carriers
(D) All of the above

Answer

Answer: (C) Immobile charge carriers