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GATE 2013 Question and Answers Comment Here, with explanation of answers..
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GATE 2013 Question and Answers Comment Here, with explanation of answers..
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The isospin and baryon number of a U quark.
ReplyDeleteThis comment has been removed by the author.
Delete1, 1/3
Deleteprob curr density prob 0.25
Deletethey asked in the inverse lattice no so the bcc is fcc and use reciprocal lattice vector formula to find the magnitude
Deleteif any one remember the data of zeeman effect prob pls post here
DeleteThis comment has been removed by the author.
DeleteThis comment has been removed by the author.
ReplyDelete1/2. 1/3
DeleteIt is correct answer for U quark.
Deleteya its 1/2 and 1/3
Deleteya it is 1/2,1/3
Deletepls post question paper
ReplyDeleteUp quark is isospin doublet so isospin is 1/2 and baryon no. is 1/3.
ReplyDelete1/2
Delete1/3
anjali ahalawat
bcc lattice question,question on superconductor, match about phonon polariton,free energy first transition,four indistinguisable particle on five boxes,same type question on fermion,second order tensor pressure moment of inertia,stress,strain,the problem for some questions dont have any choics you just have to enter the numerical values reduces the arbitrariness and finding answe r by eliminating choices.aptitude seems a bit easy comparing previous papers.
ReplyDeletewt about the no of spectral lines in sodium 2D to 2P transitions...??
ReplyDeleteeight....
Deletehow its 8?, for 2D l=2.s=1/2,for 2p l=1, s=1/2 so j=5/2 and 3/2 for 2D. and j=3/2 and 1/2 for 2p. and now j has 2j+1 values.
Delete5 spectral lines
Deletespin multiplicity is S=2s+1 so calculate for resultant s for no of spectral lines
Delete12
DeleteThis comment has been removed by the author.
Delete12 ???
Deleteno its not 5 not 8 not 12...........ok
Deletethere may be no of transitions corresponds to single spectral line so they asked practically observed spectrl lines among all transitions
Delete2D->2P transitions are diffuse series transition so it has only Triplet so 3 lines alone appears
Delete2D 5/2, 2D 3/2 , 2P 3/2 , 2P 1/2 since the transition from 2D 5/2 to 2P 1/2 is forbidden so no line hence 2D 5/2 to 2P 3/2 , 2D 3/2 to 2P 3/2, 2D 3/2 to 2P 1/2 will give weak , weaker and weakest line respectively.
Delete1)wt was the expectation value of s.j in given magnetic moment?
ReplyDelete2)wt was the expectation value of exp(ia.p)for an ideal gas in MB statistics.
3) wt was the degenerate value of a 3*3 matrix having diagonal element equal to 4 and rest were -1?
the degenerate eigen value is 5 (I got).
Deleteyes it is 5
Deleteyes it is 5
Deleterelativistic force solution ?
ReplyDeletewhat about the force and acceleration relation in relativity. My answer could not match any four of them. Later i checked my scratch paper answer on beiser book. it's matched. So guys whats your take on this.
ReplyDelete(C) option
Deletewhat was that c option
Deletecanonical momentum problem..L=alpha.q(dot)square-beta.q square
ReplyDeleteAnswer is p=2.alpha.q(dot)
ya its correct but its not conserved so its not cyclic coordinate
Deletehey any solved the spin matrix problem check it i gt 2.8 check it i think i m sure
ReplyDeleteno it is 5 100% correct
ReplyDeleterel force ans GAMM MoV
ReplyDeletePROB DENSSITY 0.25
ReplyDeletepls post Q.paper
ReplyDeleteits 7.6
ReplyDelete7.6
ReplyDelete