Home Physics Atomic Spectra Test Online Preparation Mcqs Physics Atomic Spectra Test Online Preparation Mcqs Physics Atomic Spectra Test Online Preparation Mcqs With Answers Start Below 123456789101112131415Show paginator Hide paginator 7% Question 1 of 15 1. Ground state energy of the 4th orbit in a H-atom is ______.A. -1.51 eVB. -13.60 eVC. -0.85 eVD. -3.4 eVQuestion 1 of 15 Loading... Question 2 of 15 2. Radiation produced from TV picture tube isA. InfraredB. Far infraredC. γ-raysD. X-raysQuestion 2 of 15 Loading... Question 3 of 15 3. In normal state of energy, the incident high energy photons will beA. AbsorbedB. Cause laser productionC. Cause X-ray emissionD. StimulatedQuestion 3 of 15 Loading... Question 4 of 15 4. The metastable state for an atom in laser light isA. 10-4secB. 10-8secC. 10-3secD. 10-5secQuestion 4 of 15 Loading... Question 5 of 15 5. The radiations emitted from hydrogen filled discharged tube showA. Absorption spectrumB. Continuous spectrumC. Line spectrumD. Band spectrumQuestion 5 of 15 Loading... Question 6 of 15 6. In He-Ne laser, the lasing action is produced byA. Ne onlyB. Electrons of NeC. He-Ne bothD. Electrons of HeQuestion 6 of 15 Loading... Question 7 of 15 7. X-rays are diffracted by a crystal but not by a diffraction grating because ______.A. The wavelength of X-rays are of the same order of magnitude as the separation between atoms in a crystalB. The ions in a crystal are well arrangedC. The lines in a diffraction grating cannot reflect x-raysD. The penetration power of x-rays is high in a diffraction grantingQuestion 7 of 15 Loading... Question 8 of 15 8. If the charge on electron and proton become double then Rydberg constant will beA. 2RB. R/8C. 8RD. R/2Question 8 of 15 Loading... Question 9 of 15 9. UV radiation can be produced byA. Ionization of atomsB. Heating the filamentC. All the aboveD. Electron excitation in the gasQuestion 9 of 15 Loading... Question 10 of 15 10. Wave-like characteristic of electron is demonstrated byA. Diffraction by crystalline solidsB. Production of x-raysC. Photoelectric effectD. Line spectrum of atomsQuestion 10 of 15 Loading... Question 11 of 15 11. Reverse process of photoelectric effect isA. Compton effectB. Pair productionC. x-rays productionD. Annihilation of matterQuestion 11 of 15 Loading... Question 12 of 15 12. Bracket series is obtained when all transitions of electron terminate on _______.A. 4th orbitB. 3rd orbitC. 2nd orbitD. 5th orbitQuestion 12 of 15 Loading... Question 13 of 15 13. In an X-ray tube, electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is _______.A. Impossible to predictB. he/VcC. hc/eVD. eV/hQuestion 13 of 15 Loading... Question 14 of 15 14. If the mass of electron decreases by 30% then how will it effect Rydberg constantA. Become doubleB. Become 1/8C. Remain sameD. Reduced by 70%Question 14 of 15 Loading... Question 15 of 15 15. Electrons held in the atom due toA. Gravitational forcesB. Weak nuclear forcesC. Coulomb’s forcesD. Nuclear forcesQuestion 15 of 15 Loading... Loading... Related Study Posts:MDCAT Test Physics Test Online PreparationAtomic Energy Jobs Test NTS Result 2024 Check OnlineASF Written Test Preparation Online McqsOnline ECAT Test Preparation McqsFPSC SST Test Preparation Mcqs OnlinePPSC Lecturer Test Preparation Online McqsLecturer Test KPPSC Preparation Mcqs OnlineTESCO Jobs Online NTS Test Preparation McqsFIA ASI Sub Inspectors Job 2024 OTS Test Preparation…SPSC SST Test Preparation Mcqs Online with Syllabus