Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Isha lohan 1
2D harmonic oscillator is given, every energy state can have 2 electrons (due to opposite spin). 15 electrons are given so, energy states will be occupied keeping degeneracy in account.