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Atomic Physics — JEE Main & Advanced NSEP PYQs

10 previous year questions from Atomic Physics with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

10 questionsNSEPSolutions on every page

Atomic Physics — JEE Main & Advanced NSEP PYQs

In an atom an electron excites to the fourth orbit. When it jumps back to the lower energy levels a spectrum is formed. Total number of spectral lines in this spectrum would be

An alpha particle with kinetic energy K approaches a stationary nucleus having atomic number Z . The distance of closest approach is b . Therefore the distance of closest approach

According to Bohr's theory the ionization energy of H atom is 13.6 eV . The energy needed to remove an electron from Helium ion ( He ⁺ ) is

An electron in hydrogen atom jumps from a level n=4 to n=1 . The momentum of the recoiled atom is

It is observed that some of the spectral lines in hydrogen spectrum have wavelengths almost equal to those of the spectral lines in He ⁺ ion. Out of the following the transitions i

A stationary hydrogen atom emits photon corresponding to the first line (highest wave length) of Lyman series. If R is the Rydberg constant and M is the mass of the atom, the recoi

A stationary hydrogen atom emits a photon of wavelength 1025 Å . Its angular momentum changes by

Even the radiation of highest wave length in the ultraviolet region of hydrogen spectrum is just able to eject photoelectrons from a metal. The value of threshold frequency for the

Positronium is a short-lived ( 10⁻⁹ ~s ) bound state of an electron and a positron (a positively charged particle with mass and charge equal (in magnitude) to an electron) revolvin

A hydrogen atom is in ground state ( n =1 ). The magnetic field produced by revolving electron, at centre of atom is B ₀ . Atom is excited to state n =4 . According to Bohr model,