JEE · NEET Previous Year Question
In a discharge tube ionization of enclosed gas is produced due to collisions between
Topic: NEET PYQ
Answer: C. Full step-by-step solution below.
- Aneutral gas atoms/molecules
- Bpositive ions and neutral atoms/ molecules
- Cnegative electrons and neutral atoms/ molecules
- Dphotons and neutral atoms/molecules.
Correct answer: C
Solution
(c) In a discharge tube, after being accelerated through a high potential difference the ions in the gas strike the cathode with huge kinetic energy. This collision liberates electrons from the cathode. These free electrons from the cathode. These free electrons can further liberate ions from gas molecules through collisions. The positive ions are attracted towards the cathode and negatively electrons move towards anode. Thus, ionization of gas results.More Dual Nature of Matter & Radiation PYQs
- If the wavelength of the first member of Lyman series of hydrogen is . The wavelength of the second member will be
- When a metal surface is illuminated by light of wavelength , the stopping potential is . When the same surf…
- A proton and an electron are associated with same de-Broglie wavelength. The ratio of their kinetic energies is: (Assume…
- When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, h…
- A charged particle is accelerated from rest through a certain potential difference. The de-Broglie wavelength is …