LNMU B.sc Physics Questions Download | part 3 physics 2019 | paper 5

PHYSICS  PART  -3   2019 paper 5

Download LNMU B.sc part 3 physics Question 2019 pdf 

Full marks : 100        

Pass marks : 45        PAPER – 5  

                                 

Answer any five questions, selecting two from each group, in which Q.no. 1 is compulsory.

1. Answer any four questions of the following :

a)    (a)  Discuss the Generalised co-ordinates.(Repeated 2017 )

b)   (b) What is Hamiltonian ? Give its physical significance. (Repeated 2017 )

c)    (c)  Mention the physical significance of the wave function.(Repeated 2017 )

d)    (d)  What are the fundamental postulates of statistical mechanics ?(Repeated 2017 )

e)       (e) On the basis of uncertainty principle. Show that electrons can not exist inside the     nucleus.(Repeated 2017 )

f)       (f)   Distinguish between BE, FD and classical statistics. (Repeated 2017 )

 

      GROUP – A

2. What do you understand by wave-particle duality ? Derive the de-Broglie relation and give its experimental verification.(Repeated 2017 )

3. Derive Lagrange’s equation of motion for the particle under the action of conservative forces.(Repeated 2017 )

4. Deduce Mosley’s law and show how it has been utilized in removing some of the defects of periodic table.

5. Write short notes on any of the following :

a)  (a)    Spin Orbit interaction

b)  (b)  Characteristics X-ray spectra

c)   (c)  Zeeman effect

d)   (d)   Lande’s g-factor

 

        GROUP – B

6. Define micro-canonical ensemble. Use it to obtain the entropy and internal energy of a perfect gas.(Repeated 2017 )

7. Discuss with suitable diagrams, the construction and the working of Ruby Laser.

8. What is black body radiation ? Obtain Planck’s radiation formula for black body radiation.(Repeated 2017 )

9.  Write notes on any of the following :

a)   (a) Application of Raman Effect

b)    (b) Entropy and probability(Repeated 2017 )

c)    (c)  Stefan’s Boltzmann law(Repeated 2017 )

d)    (d)  Gibb’s paradox     

          BEST OF LUCK

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