List of top Physics Questions on Bohr's model of hydrogen atom

The frequency of revolution of the electron in Bohr’s orbit varies with \( n \), the principal quantum number as:
The total energy carried by the light wave when it travels from a rarer to a non-reflecting and non-absorbing medium
What is the ratio of the wavelength of a photon?
What is the ratio of the wavelength of the Lyman series limit to the Paschen series limit?
What is the meaning of stationary orbit of atom? Deriving formula for the energy of the electron in the stationary orbit of the hydrogen atom, mention its relation with the radius of the orbit of electron.
Energy of electron in the \(n\)th orbit of hydrogen atom is \( E_n = \frac{-13.6}{n^2} \, \text{eV} \). Draw the energy level diagram for hydrogen atom and show the transition for lines of Balmer and Paschen series.
If the circumference of the nth orbit of an electron is \(S\) and the corresponding de Broglie wavelength of the orbit is \(\lambda\), then on the basis of Bohr's atom model, prove that \(S = n\lambda\).
In hydrogen atom, the kinetic energy of electron in an orbit of radius \( r \), is given by:
Draw energy level diagram for hydrogen atom. Show the transitions of the first line of Lyman series and second line of Balmer series. Find out the ratio of their wavelengths.
Hydrogen atom in its ground energy state absorbs a photon, which excites it to an energy level of \(n = 4\). Calculate the frequency of photon.
Write down Bohr's postulates for hydrogen atom. Prove that orbital radius (r) of hydrogen atom is directly proportional to square of the principal quantum number (n).
The energy of electron in an excited hydrogen atom is -3.4 eV. Determine the angular momentum of this electron.
The difference in angular momentum of electron between two successive orbits of hydrogen atom is
An electron rotates in a circle around a nucleus having positive charge Ze. Correct relation between total energy (E) of electron to its potential energy (U) is:

Theratio of the magnitude of the kinetic energy to the potential energy of an electron in the 5th excited state of a hydrogen atom is:

A stationary hydrogen atom deexcites from first excited state to ground state. Find recoil speed of hydrogen atom up to nearest integer value. 
(mass of hydrogen atom = \(1.8 \times 10^{-27}\) \(kg\))
The ratio of the wavelengths of radiation emitted when an electron in the hydrogen atom jumps from the 4th orbit to the 2nd orbit and from the 3rd orbit to the 2nd orbit is:
The ratio of the velocities of the electron in the second, third and fourth Bohr’s orbits of the hydrogen atom is:
The number of de Broglie waves associated with Bohr electron when it completes one revolution in its third orbit is

If the binding energy of ground state electron in a hydrogen atom is $136 eV$, then, the energy required to remove the electron from the second excited state of $Li ^{2+}$ will be : $x \times 10^{-1} eV$. The value of $x$ is

For below transition of e–1 of H-atom find out shortest wavelength out of given transition 

The wavelength of the radiation emitted is $\lambda_0$ when an electron jumps from the second excited state to the first excited state of hydrogen atom If the electron jumps from the third excited state to the second orbit of the hydrogen atom, the wavelength of the radiation emitted will be $\frac{20}{x} \lambda_0$ The value of $x$ is
The velocity of an electron in the seventh orbit of hydrogen-like atom is 3.6 × 106 m/s. Find the velocity of the electron in the 3rd orbit.
radius of 2nd orbit of He+ of Bohr's model is r1 and that of fourth orbit of Be3+ is represented as r2. Now the ratio\(\frac{ r_2}{r_1} \)is x: 1. The value of x is___.

For the hydrogen spectrum,the wavelength in Balmer series is given by \(\frac{1}{λ}\)=R(\(\frac{1}{n_{1}^{2}}\)-\(\frac{1}{n_{2}^{2}}\)) where λ= wavelength and R is Rydberg constant. What are the values of n1 and n2,for the longest wavelength in the Balmer series?