Physics

Entrance examination for admission to M.Sc. Radiation Physics course 2018 Instruction to Question paper setters 1. There should be two parts for the question paper viz .carrying 1 mark for short qustions and 3 marks for problem solving type questions 2. Questions should be multiple choice with 4 options 3. One and only one option should be unambigiously correct 4. Questions should cover all the areas in the following order (60% marks from Physics based on the Bsc. Main syllabus of University of Calicut, 20%- Mathematics - Complimentary /subsediary syllabus for B.Sc. Physics course 10 % for Complimentary /subsediary chemistry for B.Sc. Physics course and 10% from basic anatomy and physiology in Xth class standard of SCERT) 5. Syllabus should be evenly cover in the question paper such that all parts of the syllabus should be given equal importance and representation in the question paper. 6. Answer key along with solved problems should be attached separately along with the questions. 7. There should be two series of question papers with questions order re-arranged such that some questions will be asked to all the candidates but question number for each question will be different in two series.

UNIVERSITY OF CALICUT Admission test for M.Sc Radiation Physics Course 2018 Time: 2 hours Max.Marks 100 Encircle the correct answer for each question in the question booklet with pen only. If more than one selection is encircled it will be treated as wrong answer. Any mathematical work should be done only on the additional worksheet attached with the question booklet. Additional worksheet can be requested. The answered booklet along with the worksheet should be handed over to the invigilator. No answer booklet will be accepted after the allotted time. Reg. No.................................... Section A Each correct answer carries 1 mark and wrong answer loses ½ marks. 1. Integration system in human body is a) Nervous system b) Endocrine system c)circulatory system d) Nervous system and Endocrine system 2. The opening between right atrium and right ventricle is guarded by a) Bicuspid valve b) SA node c)Tricuspid valve d)AV node 3. Functional unit of kidney is called a) Boman’s capsule b) glomerulus c) medulla d) nephrones 4. Blood cells are formed in bonemarrow. The process is called a) Haemolysis b) Erythroblastosis c)Haemopoisis d) none of these 5. Which gland is both endocrine and exocrine a) Liver b) Spleen c) Adrenal d)Pancreas 6. Malphegian body is constituted by a) Glomorulus only b) Glomorulus and Bowman’s capsule c) Efferent vessel and Bowman’s capule d) glomorulus and Bowman’s capsule 7. Which regulate light falling on lense a)pupil b) Cornea c)Iris d) Ciliary body 8. Development of fetus takes place in a)vagina b) Uterus c) Ovary d) Oviducts 9. Sebaceous glands are found in a) Epidermis of skin b) Dermis of skin c) hypodermis of skin d) Nuclear nails and Hoof 10. The process of intelligent behavior is asociated with a) Medulla b)Hypophysis c)Cerebellar hemisphere d)Cerebral hemisphere 11. Process which has a natural urge to takes place is called

a)adiabatic process b) Spontaneous process c) Entropy d) Enthalpy 12. Isotopes have a) Identical chemical properties b) different chemical properties c) identical physical properties d) Identical physical and chemical properties 13. Number of particles participating in each elementary chemical act is called a) Order b)Molecularity c)Molarity d)Rate 14. Which of the following is strongest reducing agent a) Ba d) Cl c) Cr d) Li  15. The rank of a matrix A= 1 23 is 2 45 a)0 b)1 c)2 d) 3 16. tanh x = a)  e−x − e x  b)  e x − e−x  c)  e x  e−x  d) 2  e−x  e x   e x  e−x   e x − e−x  (ex +e−x ) 17. The nth derivative of (ax+b)n is a)an b)ann! c)an(ax+b) d)none of these 18. The condition that the vector A is the gradient of a scalar function is a) ∇ X A =0 b) ∇ . A =0 c) ∇ 2 A =0 d) ∇ A =0 19. The differential equation which is linear is dy dy dx a) dx + y ( y + x )= x 2 b) (1+ y ) + sin x =0 c) dy − x2 y=sin x d) dy + x2=sin y dx dx 20. A system absorbs 6KJ of heat and performs 3KJ of work.What is the change in internal energy of the system? a)3KJ b)9KJ c)1.5KJ d)0.5KJ 21. A black body at high temperature T radiates energy at the rate of E w/m2. When the temperature falls to T/2 the radiated energy in(W/m2) will be a) E/2 b)E/4 c)2E d)E/16 22. Resolving power of a telescope depends upon a) Length of telescope b) Diameter of objective. c) Focal length of objective. d) Focal length of eye-piece. 23. Electromagnetic radiation with minium wavelength is a) Ultraviletrays b)X-rays c) Infrared rays d)-rays. 24. The escape velocity of a particle depends upon its mass m, being propotional to- a)m2 b)m0 c)m d)m-1 25. A bomb explodes on the moon. You will hear its sound on earth after a a) 10 minutes b)2hours 18min c) 8 minutes d)You cant hear

SECTION B Each correct answer carries 3 mark and wrong answer loses 1 marks. 26. The rate constant for a first order gas decomposition is 1.6x10-5s-1 at 600k and 6.36.6x10-3s-1 at 700K . The energy of activation is ------ J/mol a) 3.09x105 b) 4.08x104 c) 2.09x104 d) 3.09x104 27. The bond enthalpies of H-H and N-N bonds are 435 and 945 KJmol-1 respectively. Then the bond energy of N-H bond in ammonia is (Given hf=-46KJmol-1) a)1171Jmol- )390KJmol-1 c)585.5KJmol-1 d)359KJmol-1 28. The volume of the parallelopiped whose edges are represented by a=2 i−3 j4 k ; b=i 2 j−k ; c=3 i − j2 k ; a) 6 b) 15 c) 28 d) 7 29. A unit vector normal to the surface z=x2+ y2 at the point( 1,2,5) is ±i2 j−k  ±2 i2 j −2 k  a) b) 6 6 ±2 i 4 j−k  ±2 i2 j −2 k  c) d) 21  24 ∂2 z 30. Let z=log(x2+y2). The partial derivative ∂x ∂ y is a) −xy2 b) −x2 y  c) −4xy d) 4xy  x2 y2  x2 y2  x2 y22  x2 y22 31. lim x 1 1−x  log x  a) 0 b) 1 c) -1 d) infinity 32. The function f(x) is continous in closed interval [a,b] and differentiable in open interval (a,b). Then there is a point c in open interval (a,b) such that a) f '  c =  f  a f  b  b) f  c =  f  b −f  a   ba   b−a  c) f  b =f a  a−b f '  c  d) f  b =f a  b−a f '  c  33. Two moles of an ideal gas expand isothermally at 295K from 0.60 m3 to 0.80 m3 . What would be the temperature of the gas if the same expansion were adiabatic.(=1.4) a)146K b). 197K. c) 221K. d) 263K 34. Find the change in wavelength of an X-ray photon when it is scattered through an angle of 900 by a free electron. a)1.2.1x10-12m. b) 2.42x10-12m. c)4.84x10-12m. d) none of them 35. The linear attenuation co-efficient for 2MeV -rays in water is 4.9m-1. How far must such a beam travel in water before its intensity is reduced to 1% of its original value. a)9.4m b)0.94m c)4.1m d).41m 36. The effieciency of a carnot engine working between steampoint and icepoint a)36% b)100% c)27% d)73% 37. The activity of a radioactivity sample falls from 600 s-1 to 500 s-1 in 40 minutes. Its T1/2 is a)152minutes b)350minutes. c)66minutes d)none of these 38. Calculate the radius of second Bohr orbit if the radius of the first Bohr orbit in hydrogen is 5.3x10-11m.

a) 10.6x10-11m. b)1.33 x10-11m. c)2.12x10-10m d)1.2X10-10m 39. How many photons are emitted per second by a 5 mW laser source operating at 632.8 nm a)3.14x1019 b) 1.6x1016 c)6.28X1016 d)1.59x1019 40. The maximum energy that a beta particle can have in the following decay Lu  Hf eν (atomic mass of L u is 175.942694 u and that of H f is 175.941420u.) a)0.351KeV b)0.382MeV c)1.182MeV d)none of these 41. The mass of an electron whose velocity is 0.99c will be a) 10 times greater than electron's rest mass b) 5 times greater than electron's rest mass c) 6 times greater than electron's rest mass d) 7 times greater than electron's rest mass. 42. The ratio of radii of P208 and 26 Mg nuclei respectively 82 12 a)2 b)4 c)8 d)16 43. The Kinetic Energy of electron whose de-Broglie wavelength is 0.707A0 a)30eV b)300eV c)30keV d)300keV 44. A parallel plate capacitor has plates of area 200 cm2 and separation between the plates 1.00 mm. What potential difference will be developed if a charge of 1.00nC is given to the capacitor- a)5.65 V b)2.26 kV c)1.77 V d)none of these 45. Young's modulus of the material of wire length L and radius r is Y N/m . If the length is reduced to L/2 and radius to r/2, then the Young's modulus will be a) Y/4 b) Y/2 c) Y d) 2Y 46. The shortest wavelength present in radiation from X-ray machine whose acceleration potential is 15kV is a)101.2A0 b)82.7A0 c)0.827A0 d)None of these 47. Numerical aperture of optic fibre is 0.2441. If the refractive index of core is1.5, Calculate the refractive index of cladding. a) 1.23 b) 1.48 c) 1.52 d) 2.14 48. Atomic mass number of an element is 232 and its atomic number is 90. The end product of this radioactive element is an isotope of lead(A=208 and 82). The number of alpha and beta particles emitted a)alpha-6 and beta-0 b) alpha-6 and beta-3 c) alpha-4 and beta-3 d)alpha-6 and beta-4 49. What is the speed and wavelength of a 20Hz frequency wave on a string of linear density () 0.20kg/m under tension of 80N? (v:velocity, wavelength) a) V=400m/s & =20m b) V=20m/s &=1m c) V=20m/s & =400m d) V=16m/s & =0.8m 50. Neglecting variation of mass with velocity, the wavelength associated with electron having a kinetic energy ,E is propotional to a)E-1/2 b)E1/2 c)E d)E-2