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   AITS-FT-VIII-PCM (Sol.)-JEE(Main)/18 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942   website: www.fiitjee.com   1    ANSWERS, HINTS & SOLUTIONS   FULL TEST – VIII   (Main) Q. No. PHYSICS Q. No. CHEMISTRY Q. No. MATHEMATICS 1. C  31. C 61. C  2. B  32. B 62. C  3. D  33. B 63. D  4. C  34. C 64. B  5. D  35. B 65. D  6. D  36. C 66.  A  7. B  37. B 67. C  8. C  38. B 68. C  9. D  39. B 69. C  10.  A  40.  A 70. C  11. C  41.  A 71. C  12. D  42.  A 72. C  13. B  43. B 73. B  14.  A  44.  A 74. B  15. D  45. B 75.  A  16.  A  46.  A 76.  A  17. C  47. B 77. C  18. D  48. B 78. B  19. B  49.  A 79.  A  20. C  50. B 80. D  21.  A  51. C 81.  A  22. D  52.  A 82. C  23. B  53. B 83. C  24. C  54. C 84. B  25. D  55. C 85. C  26. C  56. C 86. B  27.  A  57. D 87. B  28. C  58. C 88. C  29. C  59.  A 89. B  30. D  60. C 90. B      A   L   L   I   N   D   I   A    T   E   S   T   S   E   R   I   E   S  FIITJEE   JEE(Main)-2018   JEEMAIN.GURU downloaded from jeemain.guru   AITS-FT-VIII-PCM (Sol.)-JEE(Main)/18 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942   website: www.fiitjee.com   2 PPhh y  y  s si i c c  s s   PART – I   SECTION – A   1.  12 v27v8  So,  12 m8m27  (from conservation of momentum)  1/3 rA      1/312 r 82r273 2.     12 ()tDD7dd  t = 9.1  m 3. dp = dq (2R cos  ) = (3R cos   d  ) (2R cos  ) pdp    48      10  4  Coulomb-meter +dq   dq   4. In absorption spectrum electrons jumps from ground state to higher excited state. 5.  2 1En    2 rn 1pn     Ln  6. u = + 15,          14111f310    111vuf    111v1530     v = 30 cm JEEMAIN.GURU downloaded from jeemain.guru   AITS-FT-VIII-PCM (Sol.)-JEE(Main)/18 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942   website: www.fiitjee.com   3 7. path difference = (SS 1  + S 1 O)   SO     222 d2Dd2DD    2 dnD    dD (n = 1) S 1 S 2 O   D   D   S   d   8. Current through battery = 405 = 8 amp Current in branch CD = 12amp So,   CD AF i1/21i816  9. 201223/2 Nir B2(rh)     02 NiB2r  10. Let plank is slight displacement a distance x.  r  32Fkx3    32kax3m     32k3m  11. T min  = mg cos  0  …(i)   2max mvTmgR …(ii)      2 1mvmgRRcos)2 …(iii)  maxmin T4T    0  =       1 1cos2  v  0 mg   T min T max 12. Process PQ is isochoric Process QR is isothermal For process RP;  1VT VT = constant JEEMAIN.GURU downloaded from jeemain.guru   AITS-FT-VIII-PCM (Sol.)-JEE(Main)/18 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942   website: www.fiitjee.com   4 13.     12 di2LiRdt          12 t/t/0012 iq2LeRe       12 tt/ 2ee     n2t2R1LRC  14. q = 6e  2t i C  = 12 e  2t  i L  = i 1  + i 2  + i C  i L  = 4   2e  2t  15. ViZ     22 20024(50)R R = 50   V R  = i   R = 200 V 16.       1012 I2010log10    10 I10W/m 2  …(i) Bv200    m/s …(ii)      2max P2Iv     4max P210 N/m 2  …(iii)    1 5Kmv2 ….(iv)  P max  = BAK  A = 2   10  9  m ….(v) 17.     eq12eq12 RRR      eq 4800/3400800     eq 2  18.       in0 qEds0  Hence, q in  = 0 So, charge inside the surface must be zero. JEEMAIN.GURU downloaded from jeemain.guru

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Sep 22, 2019

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Sep 22, 2019
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