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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Non Vocational Teacher Physics (Junior & Senior)' And exam conducted in the year 2023. And Question paper code was '084/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
17. Consider an elastic scattering of particles in /=1 states (pstates). If the corresponding phase
shift 6,=45°and magnitude of incident wave vector is equal to ಗಗ, then the total
scattering cross section in units of fm” is:
(A) 1 (B) 32
(0) (D) 0.5
bo
18. If A and B represents Hinstein’s coefficient for spontaneous emission and stimulated
emission respectively for a particular frequency f . R represents the ratio between A and B. If
frequency is doubled, what will be the new ratio?
(A) 2R (B) 88
(0) 48 0) 0.58
2
19. A one-dimensional simple harmonic oscillator with Hamiltonian Hy = = പ്പി is subjected
7 2
toa small perturbation, H'= ax+ fx* + 244 , The first order correction to ground state energy
is give by:
^ गक മ പ്
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20. Which of the following statement is true about Klein-Gordan equation?
(^) The wave functions of the equations are not Lorentz invariant
(B) _ It has positive energy solutions only
(C) They are first order equations in time
(D) It can represent spin-0 particles like Pions
21. ಟೆ represents angular momentum operator and | j,m>represents simultaneous eigen states
of operators J® and J, What is the matrix representation of J? in | j,m>basis for j =2?
100 100
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084/2023 6 A