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IIT JAM 2011

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Brijmohan
Banaras Hindu University (BHU), Varanasi
PhD Condensed matter Physics

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fiziks Forum for CSIR-UGC JRF/NET, GATE, IIT-JAM, GRE in PHYSICAL SCIENCES IIT-JAM-2011(PHYSICS) IMPORTAN NOTE FOR CANDIDTES Attempt ALL 25 questions. Questions 1-15(objective questions) carry six marks each and questions 1625(subjective questions) carry twenty one marks each. B Q.1 The line integral F dl , where F A path as shown in the figure below is x y x x2 y2 x2 y2 , along the semi-circular y y x 1,0 (a) -2 (b) 0 1,0 (c) 2 (d) 4 Q.2 Six simple harmonic oscillations each of same frequency and equal amplitude are superposed. The phase difference between any two consecutive oscillations i.e., n n 1 is constant, where n is the phase of the n th oscillation. If the resultant amplitude of the superposition is zero, what is the phase difference ? (a) 6 (b) 3 (c) 2 Q.3 A particle of mass m is moving in a potential V x (d) 2 1 a 2 2 m 0 x 2 2mx 2 where 0 and a are positive constants. The angular frequency of small oscillations for the simple harmonic motion of the particle about a stable minimum of the potential V(x) is (a) 2 0 (b) 2 0 (c) 4 0 (d) 4 2 0 fiziks c/o Anand Institute of mathematics, 28-B/6 Jia Sarai Near IIT, Hauz Khas, New Delhi, PIN- 110016 (INDIA) Phone: 011-32718565, +91-9871145498 Website: http://www.physicsbyfiziks.com Email: fiziks.physics@gmail.com 1

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