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...

## 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

## 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

### 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

NEET

Class 12