Q27.A 12. 5 eV electron beam is used to bombard gaseous hydrogen at room temperature. The number of spectral lines emitted will be: (1) 1 (2) 4 (3) 2 (4) 3
What This Question Tests
This question requires calculating the maximum principal quantum number 'n' an electron can reach in a hydrogen atom with the given energy and then determining the total number of possible spectral lines.
Concepts Tested
Formulas Used
En = -13.6/n^2 eV
Number of spectral lines = n(n-1)/2
📚 NCERT Sections This Tests
12.8 — A 12.5 Ev Electron Beam Is Used To Bombard Gaseous Hydrogen At
Physics Class 12 · Chapter 12
12.8 A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
12.3 — A Difference Of 2.3 Ev Separates Two Energy Levels In An Atom. What
Physics Class 12 · Chapter 12
12.3 A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?
📋 Question Details
- Chapter
- Atoms
- Topic
- Bohr's model, Energy levels, Spectral series
- Year
- 2023
- Shift
- 12 Apr Shift 1
- Q Number
- Q27
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 12: Atoms
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