*BARC*
Scientist -B physics

Panel consist of 4 member -one chairman and rest other were professors

Interview -
Starts with introduction
One aptitude question related to ⏰ clock.

(5 subject preference to be written on A4 sheet , order of choices written matters)

1) quantum mechanics
- finite square well potential , derivation of energy eigenvalues and ploting
- ladder operators
2) electrodynamics
-electric dipole moment and gauss law
- solve possion eq for a given boundary condition
3)solid state physics
-structure factor of fcc lattice
-reciprocal lattice and miller indices
4) mathematical physics
- Fourier transform of delta function
5) nuclear physics
- n-z graph
- properties of nuclear forces

*BARC*
SCIENTIST -B PHYSICS

1)solid state physics
-what are miller indices why are they used for
- draw 110,101,011 planes
- what is interplanar spacing ,derive the formula
-what is reciprocal lattice
- xrd
- type of xrays
-which xray is used in xrd and why
- define braggs law
- why it is diffraction pattern not reflection pattern
- draw the pattern
- why peak of high intensity and low intensity are obtained

2)atomic physics
-difference between ls coupling and jj coupling
- spectroscopic term and there energy rules
- what is zeeman effect
- how it is different from paschen effect
-spliting and transition in zeeman and paschen effect for a given configuration

3) nuclear physics
- what is radioactivity
-what is radioactivity constant
- draw the graph of the following decay proces
A----->B------->C
-alpha decay ,beta decay and there graph
-why graph of beta deacy is continuous
- selection rule for decay

4) quantum mechanics
- how do you differentiate a particle classically and quantum mechanically
-uncertainity principle

5)emt
-magnetic field lines for current carrying wire
-force between two current carrying wire
-consider a magnetic field in z direction a particle enters a field at certain angle what will be its path
-mutually perpendicular E and B field and an electron is released at origin then what will be the path of eletron

If you were preparing for interview it is always advisable to once's go thoroughly with these Feynman lectures

I am sharing a link of caltech University which contains all the lectures and few videos to.