✓ Board-verified
Physics · 2025 · 3 marks
CBSE 2025 · Region 6 · Set 1 · Q27
How is the necessary force provided to an electron to keep it moving in a circular orbit according to Bohr model of hydrogen atom? Derive an…
How is the necessary force provided to an electron to keep it moving in a circular orbit according to Bohr model of hydrogen atom? Derive an expression for the total energy of an electron moving in an orbit of radius $\displaystyle \mathbf{r}$ in hydrogen atom. Give the significance of negative sign in this expression.
Marking-scheme solution
The electrostatic force of attraction between the electrons and the nucleus provides the necessary centripetal force required to an electron to revolve in the orbit.
More from Atoms
- Define the term - Distance of closest approach. How will it be affected, for an α - particle, if kinetic energy of the particle is doubled?2022
- Define the'distance of closest approach'. An α -particle of kinetic energy K is bombarded on a thin gold foil. Derive an expression for the'distance…2025
- State Bohr's postulate to explain stable orbits in a hydrogen atom. Prove that the speed with which the electron revolves in n^th orbit is…2022
- In Bohr's model of hydrogen atom, find the percentage change in the radius of its orbit when an electron makes a transition from n=3 state to n=2…2025
- Calculate the de Broglie wavelength associated with an electron revolving in the second excited state of hydrogen atom. The ground state energy of…2026
- State Bohr's first and second postulates. Use them to derive an expression for the radius of the n^th orbit in a hydrogen atom.2024
- Assertion: An alpha particle is moving towards a gold nucleus. The impact parameter is maximum for the scattering angle of 180^°. Reason (R): The…2024
- The radius of the n^th orbit in Bohr model of hydrogen atom is proportional to2023
CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.