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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'ASSISTANT PROFESSOR - PHYSICS' And exam conducted in the year 21. And Question paper code was '007/21'. 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.

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007/21

Total Number of Questions : 24

Time : 2.00 Hours

ॐ ٤ 7

11.

172.

13.

14.

15.

16.

. What are the differences between photodiode and p-n junction solar cell 7

. Define acceptance angle and numerical aperture of an optical fibre.

. State D’Alembert'’s principle.

. Define gyromagnetic ratio. State the relation connecting பூ, and इ of an electron.

Discuss the entropy of mixing and Gibb’s Paradox of an ideal gas.

Discuss magnetic behaviour of an ideal fermi gas and Pauli’s paramagnetism to obtain

net magnetic moment acquired by the gas.

. Describe the principle of Laser. Explain how population inversion is achieved in laser.

. Explain the difference between type | and type || superconductor using Meissner effect.

. Determine the interplanar spacing between the two parallel planes with Miller indices

(h, k, |] in a cubic crystal of side ‘a’

. Explain the functions of the ALE and 10/8 signals of the 8085 microprocessor.

Design and explain sample-and-hold circuit using op-amp. Give its applications.

The motion of a particle of mass ‘m’ in one dimension is described by the Hamiltonian

2

H= تی ہے +x. What is the difference between the quantised energies of the first

two levels ?

<<

പൈ is prepared 17 3 state

رمه otherwise

A ممه O

0, otherwise

A particle in the infinite square well potential V(x) = |

with the wave function w(x)= . Find the expectation value of the

energy of the particle.

Let (p, q) be canonical variables. Check whether the following transformations are canonical

1

2) (೦, 7) = (q tan p, log (sin p)) ०) (ದಿ, P) = 86 9 2

Find the values of a and b for which the force F =(axy + 23) + ४२] +bxz’k is conservative.

If Fourier transform of f(x) is F(S), prove that Fourier transform of f(x) cos ax کا

3 [5-ग)+15+ग)].

Max. Marks : 100

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87.0.

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