Diodes and Applications Questions and Answers
Diodes and their applications play a vital role in electronics, especially in rectification, signal clipping, and voltage regulation circuits. This topic offers electronics aptitude questions and answers with explanations on diode behavior, characteristics, and real-world applications. Perfect for GATE, BEL, and ISRO aspirants, these questions test your analytical understanding of semiconductor diodes. Practice these Diodes and Applications questions with answers to build a solid foundation in analog electronics and enhance your problem-solving ability for engineering exams and interviews.
Diodes and Applications
Showing 10 of
64 questions
11. A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:
- there is a shorter time between peaks
- there is a longer time between peaks
- the larger the ripple, the better the filtering action
- none of the above
12. Testing a good diode with an ohmmeter should indicate
- high resistance when forward or reverse biased
- low resistance when forward or reverse biased
- high resistance when reverse biased and low resistance when forward biased
- high resistance when forward biased and low resistance when reverse biased
13. The peak inverse voltage (PIV) across a nonconducting diode in a bridge rectifier equals approximately:
- half the peak secondary voltage
- twice the peak secondary voltage
- the peak value of the secondary voltage
- four times the peak value of the secondary voltage
14. Electrons in the outermost orbit or shell of an atom are called
- free electrons
- negative ions
- valence electrons
- conduction band electrons
15. Shunting the ac component away from the load is the task of a:
- transformer
- filter
- regulator
- rectifier
16. A pn junction allows current flow when
- the p-type material is more positive than the n-type material
- the n-type material is more positive than the p-type material
- both the n-type and p-type materials have the same potential
- there is no potential on the n-type or p-type materials
17. When a diode is forward biased, the voltage across it
- is directly proportional to the current
- is inversely proportional to the current
- is directly proportional to the source voltage
- remains approximately the same
18. Why is heat produced in a diode?
- due to current passing through the diode
- due to voltage across the diode
- due to the power rating of the diode
- due to the PN junction of the diode
19. The arrow in the schematic symbol of a diode points to
- the n-type material, which is called the anode
- the n-type material, which is called the cathode
- the p-type material, which is called the anode
- the p-type material, which is called the cathode
20. The diode schematic arrow points to the:
- trivalent-doped material
- positive axial lead
- anode lead
- cathode lead