Nội dung text K-2513 (Physical Science) (Paper-II).pdf
K-2513 1 /P.T.O. Instructions for the Candidates 1. Write your roll number in the space provided on the top of this page. 2. This paper consists of fifty multiple-choice type of questions. 3. At the commencement of examination, the question booklet will be given to you. In the first 5 minutes, you are requested to open the booklet and compulsorily examine it as below : (i) To have access to the Question Booklet, tear off the paper seal on the edge of this cover page. Do not accept a booklet without sticker-seal and do not accept an open booklet. (ii) Tally the number of pages and number of questions in the booklet with the information printed on the cover page. Faulty booklets due to pages/questions missing or duplicate or not in serial order or any other discrepancy should be got replaced immediately by a correct booklet from the invigilator within the period of 5 minutes. Afterwards, neither the Question Booklet will be replaced nor any extra time will be given. 4. Each item has four alternative responses marked (A), (B), (C) and (D). You have to darken the oval as indicated below on the correct response against each item. Example :A B C D where (C) is the correct response. 5. Your responses to the questions are to be indicated in the OMR Sheet kept inside the Paper I Booklet only. If you mark at any place other than in the ovals in the Answer Sheet, it will not be evaluated. 6. Read the instructions given in OMR carefully. 7. Rough Work is to be done in the end of this booklet. 8. If you write your name or put any mark on any part of the OMR Answer Sheet, except for the space allotted for the relevant entries, which may disclose your identity, you will render yourself liable to disqualification. 9. You have to return the test OMR Answer Sheet to the invigilators at the end of the examination compulsorily and must NOT carry it with you outside the Examination Hall. 10. You can take away question booklet and carbon copy of OMR Answer Sheet soon after the examination. 11. Use only Blue/Black Ball point pen. 12. Use of any calculator or log table etc., is prohibited. 13. There is no negative marks for incorrect answers. 1. ! ! " # $% 2. &'( !) *+ ,-./ 0 '1 "2 "2 3 % 3. $ ( 4 5' 6 7 '1 " ( " 2 8 52 % 5- 92 ( 0" 0 ( 0 ( 85 5 : $ ;4 ( 5 % (i) '1 " ( 2 ' 15 (51 8 7) ( < = )" $# $% (>, ? '1 " ( @ ( $ A 3%0 ( @ ( " $ A 3% (ii) ! "#$ ! "%$&" ' "(&")*+ (#, -.$/,0)&1 2",(3 2", "",45& 2",6#7)"& " #, & & 89.# :'5;<8& "=>1 < ?. &. 67"@&',A BC D@ @&',A',"(51)"& EF"" :',"(5 4. '&+ '1 2" (A)7(B)7(C) 0 (D)B 2 & 5 , CD E02F % '1 " B $CE0 7( 2 (5G 0 < 85(H& (" 5 I A ( % G&,E70H A BC D (C)$CE0 55J2% 5. '1 "&'( I ( K> OMR E0)5 7 I"# II767";"IG#7 J#K&L%OMR E0 )5 < 85(H& A C E0 "2 & 7 < LM N C C852 % 6. OMR E0)5 ( >O 2 "P52(0 # Q$. 7. B5(8 ( "( ( C80(, J% 8. 2 0 "!R 23!) 5 )
Total Number of Pages : 8 Paper II 4 K-2513 18. Existence of quadrupole moment for a charge distribution signifies that it is (A) spherically symmetric (B) having only +ve charges (C) spherically asymmetric (D) having only –ve charges 19. ∇ ⋅B = 0 -implies that (A) magnetic field is solenoidal (B) magnetic field is non-solenoidal (C) no current is flowing (D) magnetic field is not due to current flow 20. Because of electromagnetic potentials, the number of Maxwell’s equation is (A) reduced to 2 (B) increased to 6 (C) four (D) reduced to 1 21. The ratio of skin depth in copper at 10 kHz to that at 100 MHz is (A) 1 (B) 10 (C) 100 (D) 1000 22. The characteristic impedance of free space for propagation of plane, monochromatic electromagnetic wave is around (A) 3.77Ω (B) 37.7Ω (C) 377.0Ω (D) 3777Ω 23. An isotropic dielectric offers a refractive index of 1.5 to the propagation of a plane monochromatic electromagnetic wave through it. Its dielectric constant is (A) 2 (B) 1 (C) 0.5 (D) 2.25 24. The reflectance in visible region at normal incidence is (A) nk (B) 2 2 2 2 (n 1) k (n 1) k + + − + (C) 2 2 2 2 (n 1) k (n 1) k + + − − (D) n2 k2 25. The path of the charged particle in a region of crossed electric and magnetic fields is (A) helical (B) hyperbolic (C) parabolic (D) circular 26. If the deBroglie wavelength of Helium atom at 300 K is 0.7 A , then at 600 K it will be (A) 4.9 A (B) 49 A (C) 0.49 A (D) 0.049 A 27. The probability current density for an unnormalized wave function ψ = exp (ikx) is (A) 2m k 2 2 (B) m k (C) m k 3 3 (D) 0 28. A particle of energy E incident on a potential barrier of height Vo can tunnel through it iff (A) E < Vo (B) E > Vo (C) E = Vo (D) E = 0