phys 1st yr ip q's

1.derive xpression 4 cohessive energy of a n ionic crystal?

prob: cohessive energy?

2.variation of attractive P.E. n repilsive P.E.?

3.calculate d pf of sc,bcc,fcc n show fcc has high pf value?

4.derive d expression 4 d inter planar distance interms of miller indices 4 a cubic structure?

prob: d=a/root(h2+k2+l2); 2dsin0=n*lamda;

5.state n xplain d method (bragg's,lave,powder) 2 dtermine crystal structure

6.defects in crystals

7.note on mb,be,fd statistics

8.drive d plank's laws of block body radiation?xplain plank's quantum theory

9.schrodinger's time independent wavw eqn 4 electron?application of it?

prob: calculation of "lamda" n En:)n2h2)/(8mL2)

10:expt which supports d dual nature of prticle(GP.thomson ,davission german)

11.origin of energy band formation in solids?

based on band theory od soic how the materials are classified in conductors,semiconductors n insulators

12.concept of effective mass of electron n hole? bloch theorem?

13.xplain the kronig-penny?

14.obtain xpession for carrier concentration in intrinsic n xtrinsic semicond.?

15.hall effect?drive xpression 4 it for holes n electr.?

16.on biasingxplain the V-I charecterstics of PN diode?

17.drive xpression 4 diode eqn

18.applications of semiconductor devices in various fields/

"

19.show p=E0(Er-1)E and X=Er-1?

20.xplain polarization mechanism in dielectrics?calculate d polarizability

21.piezo,pyro,ferro electricites?xplain applications of these/

22.show B=M0(H+m) and X=Mr-1?define B,H,M,X?

prob.s?

23.show Ml=1/2 (ewr2) in case of H-atom

24.langevin's theory of para magnetism?

25.applications of magnetic materials? applications of semicondu.

26.einstein's coeffecients n relation among them 4 spontaneius and stiulated emmision?

27.construction and wrking of ruby,He-Ne laser.semiconductor lasers?

28.applications of lase(medical,scintific,industrial)

29.basic principle of optical fiber?drive xpression 4 numerical aperture of an optical fiber:

prob on NA,0acc,delta

30.applocation of optical fiber(advantages over conventional cables)

31.write dwn d sbines frmula?

xplain d terms involved in itn dscribe d units of each of them.state d limitations of frmula?

32.xplain how d reverberation time of hall is affected by

i)it's size

ii)nature of it's wal surface

iii)audience

33.write a detailed note abt nanoscience and nano tech?

34.why nanomaterials exhibit different properties?xplain

35.list a few methods of synthesis of nano materials ?

36.mention d applaicatons of nano materials/

37.xplain d synthesis of carbon nanotubes ?

metion d properties of carbon nano tubes

38.what is nanotech.?

hw it is useful 2 society?

aftr trying all these then i'll goto d other concepts

may b these useful 2 u also.

study wel. al d bst