NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...
VISIT NOW

WB JEE

Atoms and Nuclei

Physics

Previous Years Questions

MCQ (More than One Correct Answer)

More
A sample of hydrogen atom in its ground state is radiated with photons of 10.2 eV energies. The radiation from the sampl...
WB JEE 2022
Let vn and En be the respective speed and energy of an electron in the nth orbit of radius rn, in a hydrogen atom, as pr...
WB JEE 2017

MCQ (Single Correct Answer)

More
Suppose in a hypothetical world the angular momentum is quantized to be even integral multiples of $${h \over {2\pi }}$$...
WB JEE 2022
If the kinetic energies of an electron, an alpha particle and a proton having same de-Broglie wavelength are $${\varepsi...
WB JEE 2022
Let r, v, E be the radius of orbit, speed of electron and total energy of electron respectively in H-atom. Which of the ...
WB JEE 2021
A 12.5 eV electron beam is used to bombard gaseous hydrogen at ground state. The energy level upto which the hydrogen at...
WB JEE 2021
If R is the Rydberg constant in cm-1, then hydrogen atom does not emit any radiation of wavelength in the range of...
WB JEE 2020
To which of the following the angular velocity of the electron in the n-th Bohr orbit is proportional?
WB JEE 2019
A proton and an electron initially at rest are accelerated by the same potential difference. Assuming that a proton is 2...
WB JEE 2019
An electron accelerated through a potential of 10000 V from rest has a de-Broglie wave length $$\lambda$$. What should b...
WB JEE 2018
If the half-life of a radioactive nucleus is 3 days, nearly what fraction of the initial number of nuclei will decay on ...
WB JEE 2018
How the linear velocity v of an electron in the Bohr orbit is related to its quantum number n?
WB JEE 2018
Radon-222 has a half-life of 3.8 days. If one starts with 0.064 kg of radon-222 left after 19 days will be
WB JEE 2017
The de-Broglie wavelength of an electron is $$0.4 \times {10^{ - 10}}$$ m when its kinetic energy is 1.0 keV. Its wavele...
WB JEE 2017
Which of the following statements is correct?
WB JEE 2008
The ionisation potential of hydrogen atom is $$-$$13.6 eV. An electron in the ground state of a hydrogen atom absorbs a ...
WB JEE 2008

Joint Entrance Examination

JEE Main JEE Advanced WB JEE

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

Medical

NEET

CBSE

Class 12