Types of Diode and their Testing MCQ’s

Analog Electronic Circuits Electronics & Communication Engineering

This set of Analog Electronic Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Types of Diode and their Testing”.

1. What is the expected reading obtained on a Digital Display Meter with diode-checking function when a proper functioning silicon semiconductor diode is connected across its leads in the forward bias configuration?
a) 0.67 V
b) 0.3 V
c) Open Loop Indication
d) Varies with the diode

2. What is the expected reading obtained on a Digital Display Meter with diode-checking function when a proper functioning silicon semiconductor diode is connected across its leads in the reverse bias configuration?
a) 0.67 V
b) 0.3 V
c) Open Loop Indication
d) Varies with the diode

3. Which of the following equipment can’t be used to check the condition of a diode?
a) Digital Display Meter
b) Ohmmeter
c) Curve Tracer
d) CRO

4. A diode on being checked by a DDM with diode checking function results in an open loop indication in both directions. Which of the following is the correct inference drawn from the given situation?
a) Power failure to the DDM
b) Diode is faulty
c) Diode is proper
d) Device isn’t connected properly

5. A silicon semiconductor diode when subjected to ohmmeter testing gives high resistance in both directions. Which of the following is the correct inference to be drawn?
a) Diode is faulty
b) Power failure to the Ohmmeter
c) Diode is short-circuited
d) Diode is open circuited

6. Which material is generally used for the manufacture of Zener diode?
a) Silicon
b) Germanium
c) Mercury
d) Arsenic

7. A silicon semiconductor diode when subjected to ohmmeter testing gives low resistance in both directions. Which of the following is the correct inference to be drawn?
a) Diode is faulty
b) Power failure to the Ohmmeter
c) Diode is short-circuited
d) Diode is open circuited

8. How can the location of the Zener region be controlled in the diode characteristic curve?
a) By changing the value of Iz
b) By changing the doping concentration of the diode
c) By changing the operating temperature
d) By increasing the size of diode

9. Which of the following is not a part of the equivalent circuit of a Zener diode?
a) Dynamic Resistance
b) DC Battery
c) Ideal diode
d) Piecewise linear model of diode

10. Which of the following materials is used to make LEDs?
a) Silicon
b) GaAsP
c) Germanium
d) Selenium

11. Which of the following is not an advantage of using a LED?
a) High response time
b) Compatibility with solid-state circuits
c) Rugged construction and high lifetime
d) No need for a heat sink in long run

12. Which of the following voltages may be considered as a safe and sufficient voltage for the operation of a LED?
a) 0.7 V
b) 5 V
c) 2.7 V
d) -5 V

13. What is the order of magnitude of the response time of LED?
a) 10-6
b) 10-9
c) 10-15
d) 10-3

14. At 298 K, the nominal Zener voltage is found to be equal to 10 V. Given that the value of the temperature coefficient is 0.072 (%/K), what is the nominal Zener Voltage at 398 K?
a) 9.46 V
b) 9.54 V
c) 0.54 V
d) 10.54 V

15. A LED will glow if connected under reverse bias configuration.
a) True
b) False

Leave a Reply

Your email address will not be published. Required fields are marked *