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Iit Jam Physics Free Solved Paper(1) 99411612 (1)

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    UGC NET, GATE, CSIR NET, IIT-JAM, IBPS, CLAT, SSC, SLET, CTET, TIFR, NIMCET, JEST, JNU, ISM etc.   Toll Free: 1800-2000-092 Mobile: 9001297111, 9829619614, 9001252666 Website: www.vpmclsses.com F! #$li$e %t&'e$t (ortl: e)mprep.vpmclsses.com  #$li$e %tore: store.vpmclsses.com  -Mil: vpmclsses*+oo.com i$o*vpmclsses.com  Page 1    UGC NET, GATE, CSIR NET, IIT-JAM, IBPS, CLAT, SSC, SLET, CTET, TIFR, NIMCET, JEST, JNU, ISM etc.   Toll Free: 1800-2000-092 Mobile: 9001297111, 9829619614, 9001252666 Website: www.vpmclsses.com F! #$li$e %t&'e$t (ortl: e)mprep.vpmclsses.com  #$li$e %tore: store.vpmclsses.com  -Mil: vpmclsses*+oo.com i$o*vpmclsses.com  Page 2 SECTION-A MULTIPLE CHOICE QUESTIONS (MCQs) (Q. 1-30) 1. A particle is moving in space with 0 as the srcin. Some possible expression for it’s position velocity is given in polar coordinates (r, θ, φ, )   are given belo   w. Which of the following options is correct ? (A) r ˆrre =  ˆ ˆre e θ φ + + , r ˆ ˆv re r e r sin θ = + θ + θ ɺɺ ɺ ˆe φ φ ɺ  (B) r ˆrre =  r ˆˆˆvrerersine θφ =+θ+θφ ɺɺɺ  (C) r ˆ ˆr re r e φ = + θ  22r ˆˆvrerrsine φ =+θ+θφ ɺɺɺ  (D) r ˆˆrrere θ =+θ  r ˆ ˆv re r e θ = + θ ɺɺ   2. A satellite moves around a planet in a circular orbit at a distance R from its centre . The time period of revolution of the satellite is T. If the time period of satellite is become 8T then what will be the new radius of orbit . (A) R2  (B) 4R (C) R4  (D) 2R 3. A solid sphere of mass 2m and radius a/2 is rolling with a linear v speed on a flat surface without slipping. The magnitude of the angular momentum of the sphere w.r.t a point along the path of the sphere on the surface is,   (A) 2mav5      UGC NET, GATE, CSIR NET, IIT-JAM, IBPS, CLAT, SSC, SLET, CTET, TIFR, NIMCET, JEST, JNU, ISM etc.   Toll Free: 1800-2000-092 Mobile: 9001297111, 9829619614, 9001252666 Website: www.vpmclsses.com F! #$li$e %t&'e$t (ortl: e)mprep.vpmclsses.com  #$li$e %tore: store.vpmclsses.com  -Mil: vpmclsses*+oo.com i$o*vpmclsses.com  Page 3 (B) mav2  (C) mav (D) 2mav 4. An object of mass m moving with a velocity v is appro   aching a second object of the same mass but at rest. The total kinetic energy of the two objects as viewed from the centre of mass is, (A) mv 2 (B) 2 1mv2   (C) 2 1mv4  (D) 2 1mv8   5. Moment of inertia of a uniform solid cylinder about its axis having length l and radius R is (A) ℓ 2 1M2  (B) 2 1MR2  (C) ( ) l  + 2 2 1M R2  (D) ( ) l  + 2 2 1M 2R4      UGC NET, GATE, CSIR NET, IIT-JAM, IBPS, CLAT, SSC, SLET, CTET, TIFR, NIMCET, JEST, JNU, ISM etc.   Toll Free: 1800-2000-092 Mobile: 9001297111, 9829619614, 9001252666 Website: www.vpmclsses.com F! #$li$e %t&'e$t (ortl: e)mprep.vpmclsses.com  #$li$e %tore: store.vpmclsses.com  -Mil: vpmclsses*+oo.com i$o*vpmclsses.com  Page 4 6. A thin massless rod of length l has equal point masses m attached at its length (see figure ). The rod is rotating about an axis passing through its centre and making angle θ  with it. The magnitude of the rate of change of its angular momentum   (A) 2m l 2   ω 2 sin θ cos θ (B) m l 2 ω  sin 2 θ (C) l 22 m4 ω  sin 2 θ (D) l 2 m2  ω  sin 2 θ 7. The weig   ht of a body at a height is equal to the radius of the earth. W is its weight at a height which is equal to three times the radius of the earth which will be (A) W2  (B) W3  (C) 4W3  
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