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IIT JAM 2014

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

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fiziks Institute for NET/JRF, GATE, IIT-JAM, JEST, TIFR and GRE in PHYSICAL SCIENCES IIT-JAM 2014 PART-1: OBJECTIVE QUESTIONS 1. 2. , b 2i 3 and c For vectors a j k j 5k j k , the vector product a b c is (a) in the same direction as c (b) in the direction opposite to c (c) in the same direction as b (d) in the direction opposite to b A particle of mass m carrying charge q is moving in a circle in a magnetic field B. According to Bohr s model, the energy of the particle in the nth level is (a) 3. 1 n2 hqB m hqB (b) n m hqB (c) n 2 m hqB (d) n 4 m A conducting slab of copper PQRS is kept on the xy plane in a uniform magnetic field along x-axis as indicted in the figure. Z A steady current I flows through the S cross section of the slab along the y-axis. The direction of the electric Q P field inside the slab, arising due to the applied magnetic field is along R I Y B X the (a) negative Y direction (c) negative Z direction 4. (b) positive Y direction (d) positive Z direction A collimated beam of light of diameter 1 mm is propagating along the x-axis. The beam is to be expanded to a collimated beam of diameter 10 mm using a combination of two convex lenses. A lens of focal length of 50 mm and another lens with focal length F are to be kept at a distance d between them. The values of F and d respectively, are (a) 450 mm and 10 mm (c) 550 mm and 600 mm 5. (b) 400 mm and 500 mm (d) 500 mm and 550 mm Octal equivalent of decimal number 47810 is (a) 7368 (b) 6738 (c) 637 8 Head office fiziks, H.No. 23, G.F, Jia Sarai, Near IIT, Hauz Khas, New Delhi-16 Phone: 011-26865455/+91-9871145498 Website: www.physicsbyfiziks.com Email: fiziks.physics@gmail.com (d) 3678 Branch office Anand Institute of Mathematics, 28-B/6, Jia Sarai, Near IIT Hauz Khas, New Delhi-16 1

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