Indirectly heated cathode means that the:
Correct answer: A. Filament heats the cathode
- A. Filament heats the cathode
- B. Cathode heats the filament
- C. Grid heats the filament
- D. None of these
Explanation
In an indirectly heated cathode, the filament (also known as the heater) is responsible for heating the cathode. The filament is typically made of tungsten wire and is heated by passing an electric current through it. As the filament heats up, it emits thermal radiation, which then heats the cathode indirectly.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
Practise Electromagnetism
1,176 free Electromagnetism MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.