Question28:-The value of the commutator *[x~(4)" , *p_(x)]" is

477
D:-

Correct Answer:- Option-D
Question29:-Application of time independent perturbations to linear stark effect of hydrogen atom
A:-Completely removes degeneracy of n = 2 level and splits it into four levels
B:-Partially removes degeneracy of n = 2 levels and splits it into three levels
C:-Partially removes degeneracy of n = 2 level and splits it into two levels
D:-Does not remove degeneracy to any extent
Correct Answer:- Option-B
Question30:-The wave function of a particle is given by *Psi =(1)/(sqrt(2))phi_(0)* , where "phi_{0)" is the nomalized eigen
function with energy *E_(0)". The expectation value of the Hamiltonian in the 51216 ` ೧51 ‏کا‎
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D:-"sqrt(2)E_{0)
Correct Answer:- Option-C
Question31:-For a one dimensional potential well specified by V(x} = 0 for-a < x < a and V{(x} = o0’ for [x| > a, the zero
point energy is
A:-Some value greater then zero
B:-Some value less than zero
C:-Equal to zero

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Correct Answer:- Option-A
Question32:-The total spin angular momentum S of a system of three electrons is
&- (0/2)
B:-0and 1
6:1
0:-`(1)/(2) 876 (3)/(2)”
Correct Answer:- Option-D

Question33:-The phase shifts measured for the elastic scattering of 50 MeV neutrons from a nucleus are “delta_{0)=
90°(@)" ; “delta_(1) = 60~(@)" . The total cross section is
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0: (2/2)
Correct Answer:- Option-A
Question34:-For a Hermitian operator, the eigen values are
A:-zeros
B:-real
C:-complex
D:-imaginary
Correct Answer:- Option-B
Question35:-The eigen functions of angular momentum operator are
A:-Bessel function
B:-Gamma function
C:-Hermite polynomials
D:-Spherical harmonics
Correct Answer:- Option-D