Physics · 2026
JEE Main · 21 January 2026, Shift 2 · Q44
The energy of an electron in an orbit of the Bohr's atom is -0.04 E_0 eV where E_0 is the ground state energy. If L is the angular momentum of the…
The energy of an electron in an orbit of the Bohr's atom is $\displaystyle -0.04 E_0 \mathrm{eV}$ where $\displaystyle E_0$ is the ground state energy. If $\displaystyle L$ is the angular momentum of the electron in this orbit and $\displaystyle h$ is the Planck's constant, then $\displaystyle \frac{2 \pi L}{h}$ is $\displaystyle \_\_\_\_$:
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 5$
More from Atoms and Nuclei
- In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a lower orbit (f). The ratio of the radius of the orbits in given…2026
- The energy released if hydrogen atoms are combined to form _2^4 He is ____ MeV. (Take binding energies per nucleon of _1^2 H and _2^4 He as 1.1 MeV…2026
- Two nuclei of mass number 3 combine with another nucleus of mass number 4 to yield a nucleus of mass number 10. If the binding energy per nucleon for…2026
- Angular momentum of an electron in a hydrogen atom is (3 h)/(π), then the energy of the electron is ____ eV.2026
- The binding energy per nucleon of _83^209 Bi is ____ MeV. [Take m(_83^209 Bi)=208.980388 u, m_p=1.007825 u, m_n=1.008665 u, 1 u=931 MeV / c^2 ]2026
- Two radioactive substances A and B of mass numbers 200 and 212 respectively, shows spontaneous α -decay with same Q value of 1 MeV. The ratio of…2026
- Assuming the experimental mass of _6^12 C as 12 u, the mass defect of _6^12 C atom is ____ MeV / c^2. (Mass of proton =1.00727 u. mass of neutron…2026
- The ratio of momentum of the photons of the 1^st and 2^nd line of Balmer series of Hydrogen atoms is α / β. The possible values of α and β are:-2026
JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.