S. S. JAIN SUBODH P.G.(AUTONOMOUS) COLLEGE, JAIPUR I CIA (B.Sc. Semester II) Test, March 2015 Physics Duration: 2 Hours _____________________________________________________________________________ Instructions to the Candidates/ vko’;d funs’Z k %& Note:- Each paper consists of one major question with internal choice. Students are required to answer any one question from each paper. lqpuk& izR;sd iz’ui= esa ,d izeq[k iz’u iwNs tk;sxAsa ijh{kkfFkZ;ksa dks dksbZ ,d iz’u djuk vfuok;Z gSA Paper-I MAX.MARKS-10 Mechanics-II (1) Describe the principle of a Rocket. Establish the following relation for final velocity v=v0+vrlogeM0/M, where the term have usual meaning. jkWdsV dk fl)kUr le>krs gq, mlds vfUre osx ds fy, fuEukfdar lEcUËk velocity v=v0+vrlogeM0/M LFkkfir dhft, inks a ds lkekU; izpfyr vFkZ gSA OR What is Centre of Mass Frame of reference? Analyze the head on elastic collision of two particles in Centre of mass frame. nzO;eku dsUnz funsZ’k ra= D;k gSA nks d.kksa dh lEeq[k izR;kLFk VDdj dh nzO;eku dsUn funs’Z k ra= esa foospuk djksA Paper-II MAX.MARKS-10 Electromagnetism-II (2) Prove that the spin gyromagnetic ratio in an atom is double the orbital gyromagnetic ratio. fl) dhft, fd fdlh ijek.kq esa pØ.k tkbjkseSxusfVd fu"ifÙk dk eku dBh; tkbjkseSxusfVd fu"ifÙk ds eku dk nqxuk gksrk gSA OR Establish a relataion between magnetic susceptibility and magnetic permeability for a magnetic material. fdlh pqEcdh; inkFkZ dh pqEcdh; izo`fÙk rFkk pqEcdh; ikjxE;rk ds e/; laca/k izkIr dhft,A Paper-III MAX.MARKS-10 Oscillations & Waves-II (3) Derive the equation of motion & dispersion relation for one dimensional monotomic lattice. ,d foHkh; ,dy ijek.kq v.kqtky ds fy, xfr dk lehdj.k ,oa ifj{ksi.k lEcU/k dks O;qRiUu dhft,A OR Explain the lattice vibrations for one dimensional diatomic lattice & derive the equation of dispersion relation for this lattice. ,d foHkh; f) ijek.kq tkyd ds dEiUuksa dh O;k[;k dhft, rFkk nl tkyd ds fy, ifj{ksi.k lEcU/k O;qRiUu dhft,A