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IIT JAM 2015

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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 JAM JOINT ADMISSION TEST FOR MSc 2015 SECTION A: MCQ Q1. A proton from outer space is moving towards earth with velocity 0.99 c as measured in earth s frame. A spaceship, traveling parallel to the proton, measures proton s velocity to be 0.97 c . The approximate velocity of the spaceship in the earth s frame, is (a) 0.2 c Q2. (b) 0.3 c (c) 0.4 c Temperature dependence of resistivity of a metal can be described by (a) (b) R R T T (c) R (d) R T Q3. (d) 0.5 c T The trace of a 2 2 matrix is 4 and its determinant is 8 . If one of the eigenvalues is 2 1 i , the other eigenvalue is (a) 2 1 i Q4. (b) 2 1 i (c) 1 2i (d) 1 2i At room temperature, the speed of sound in air is 340 m/sec. An organ pipe with both ends open has a length L 29 cm . An extra hole is created at the position L / 2 . The lowest frequency of sound produced is (a) 293 Hz (b) 586 Hz (c) 1172 Hz 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) 2344 Hz Branch office Anand Institute of Mathematics, 28-B/6, Jia Sarai, Near IIT Hauz Khas, New Delhi-16 1

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