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

A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. The number of spectral lines emitted will be:
The ratio of radii of two nuclei having atomic mass numbers 27 and 8 respectively, will be:
Given below are two statements:
Statement I: In hydrogen atom, the frequency of radiation emitted when an electron jumps from lower energy orbit \((E_1)\) to higher energy orbit \((E_2)\), is given as \(hf = E_1 – E_2.\)
Statement II: The jumping of electron from higher energy orbit \((E_2)\) to lower energy orbit \((E_1)\) is associated with frequency of radiation given as
\(f=\frac{(E_2−E_1)}{h}\) This condition is Bohr’s frequency condition.
In the light of the above statements, choose the correct answer from the options given below:
Let \(T_1\) and \(T_2\) be the energy of an electron in the first and second excited states of the hydrogen atom, respectively. According to Bohr’s model of an atom; the ratio T1:T2 is:
In Bohr atom model, the total energy of the electron in hydrogen atom is -3.4eV. Then its angular momentum about the nucleus of the atom is (h=Planck's constant)
In the given figure, the energy levels of hydrogen atom have been shown along with some transitions marked $A , B , C , D$ and $E$. The transitions $A, B$ and $C$ respectively represent :
If an electron in hydrogen atom jumps from an orbit of level \( n = 3 \) to an orbit at level \( n = 2 \), emitted radiation has a frequency of
\( (R = \text{Rydberg’s constant}, \ c = \text{speed of light}) \)
The ratio of the total energy E of the electron to its kinetic energy K in hydrogen atom is
The figure shows standing de Broglie waves due to the revolution of electron in a certain orbit of hydrogen atom. Then the expression for the orbit radius is (all notations have their usual meanings)
de Broglie waves due to the revolution of electron in a certain orbit of hydrogen atom
An electron in Bohr's hydrogen atom has an energy of -3.4 eV. The angular momentum of the electron is:
An electron collides with a Hydrogen atom in its ground state and excites it to $n = 3$ state. The energy given to the Hydrogen atom in this inelastic collision (neglecting the recoil of Hydrogen atom) is
An electron is at ground state of the $H$ atom. Minimum energy required to excite the $H$ atom into second excited state is
The Bohr model of atoms
If elements with principal quantum number $n > 4$ were not allowed in nature, the number of possible elements would be
In the Bohr model of the hydrogen atom, let R, V and E represent the radius of the orbit, speed of the electron and total energy of the electron respectively. Which of the following quantity is proportional to the quantum number n ?