Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > The emission of electrons in a vacuum diode i...
Start Learning for Free
The emission of electrons in a vacuum diode is achieved by
- a)heating
- b)electron bombardment
- c)magnetic field
- d)electrostatic field
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The emission of electrons in a vacuum diode is achieved bya)heatingb)e...
Understanding Vacuum Diodes
Vacuum diodes are fundamental electronic components used for rectification and signal processing. They consist of two electrodes: a cathode and an anode, enclosed in a vacuum.
How Electrons are Emitted
The emission of electrons from the cathode in a vacuum diode is primarily achieved through the process of heating, known as thermionic emission. Here’s how it works:
Why Other Options are Incorrect
In summary, heating is the fundamental method for electron emission in vacuum diodes, making option 'A' the correct answer.
Vacuum diodes are fundamental electronic components used for rectification and signal processing. They consist of two electrodes: a cathode and an anode, enclosed in a vacuum.
How Electrons are Emitted
The emission of electrons from the cathode in a vacuum diode is primarily achieved through the process of heating, known as thermionic emission. Here’s how it works:
- Heating the Cathode: The cathode is heated to a high temperature, typically using a filament or a heater. This thermal energy provides the necessary energy for electrons to overcome the work function of the cathode material.
- Thermionic Emission: At elevated temperatures, electrons gain sufficient kinetic energy to escape from the surface of the cathode into the vacuum. This phenomenon is called thermionic emission.
- Vacuum Environment: The vacuum within the diode ensures that emitted electrons can travel freely towards the anode without colliding with air molecules, which would impede their movement.
Why Other Options are Incorrect
- Electron Bombardment: This method involves bombarding a material with electrons to induce emission, but it is not the primary mechanism in vacuum diodes.
- Magnetic Field: Magnetic fields can influence charged particles but do not directly cause electron emission in vacuum diodes.
- Electrostatic Field: While electrostatic fields can accelerate emitted electrons, they do not initiate the emission process.
In summary, heating is the fundamental method for electron emission in vacuum diodes, making option 'A' the correct answer.
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Top Courses for Electronics and Communication Engineering (ECE)View all
The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer?
Question Description
The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2025 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer?.
The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2025 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer?.
Solutions for The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The emission of electrons in a vacuum diode is achieved bya)heatingb)electron bombardmentc)magnetic fieldd)electrostatic fieldCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup