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AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
AIPMTPhysics  1994
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AIPMTPhysics 1994

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    • 1. aipmt–Past papers
      PHYSICS- UNSOLVED PAPER - 1994
    • 2. SECTION – I (Total Marks : 50)
      Single Correct Answer Type
      There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
    • 3. 01
      Problem
      A hollow metallic sphere of radius 10 cm is charged such that potential of its surface is 80 V. The potential at the centre of the sphere would be  
      80 V
      800 V
      zero
      8 V.
    • 4. Problem
      02
      Charge q2 is at the centre of a circular path with radius r. Work done in carrying charge q1, one around the equipotential path, would be
       a.
      b.
      c. zero
      d. infinite.
    • 5. Problem
      03
       A magnet oscillates, in earth’s magnetic field, with a time-period T. If its mass is quadrupled, then its new time – period will be  
      T/2, motion remaining S.H.M
      Unaffected but motion is not S.H.M.
      4T, motion remaining S.H.M.
      2T, motion remaining S.H.M.
    • 6. Problem
      04
      The given figure gives electric lines of force due to two charges q1 and q2. What are the sings of the two charges? 
      q1 is positive but q2 is negative
      q1 is negative but q2 is positive
      both are negative
      both are positive.
    • 7. Problem
      05
      A circular loop of area 0.01 m2 carrying a current of 10 A, is held perpendicular to a magnetic field of intensity 0.1 T. The torque acting on the loop is  
      N .m
      0.8 N.m
      zero
      N.m
    • 8. Problem
      06
      An electric bulb is rated 60 W, 220 V. The resistance of its filament is 
      870
      780
      708
      807
    • 9. Problem
      07
      Two cables of copper are of equal lengths. One of them has a single wire of area of cross- section A, while other has 10 wires of Cross-sectional area A/10 each. Give their suitability for transporting A.C. and D.C.
      Only multiple strands for A.C., either for D.C.
      Only multiple strands for A.C., only single strand for D.C.
      Only single strand for D.C., either for A.C.
      Only single strand for A.C., either for D.C.
    • 10. Problem
      08
      An L-C-R circuit is connected to a source of A.C. current, At resonance, the phase difference between the applied voltage and the current in the circuit, is  
      a.
      b. zero
      c. /4
      d. /2
    • 11. Problem
      09
      A wire 50 cm long and 1 mm2 in cross –section carries a current of 4 A when connected to a 2 V battery. The resistivity of the wire is
       
      4 x 10-6
      1x 10-6
      2x 10-7
      5 x10-7 .
    • 12. Problem
      10
      Six resistors of 3 each are connected along the sides of a hexagon and three resistor of 6 each are connected along AC, AD and AE as shown in the figure. The equivalent resistance between A and B is equal to  
      2
      6
      3
      9
    • 13. Problem
      11
      A small source of light is 4 m below the surface of water of refractive index 5/3. In order to cut off all the light, coming out of water surface, minimum diameter of the disc placed on the surface of water is
      a. 6 m
      b.
      c. 3m
      d. 4m
    • 14. Problem
      12
      In an A.C. circuit, Irms and andI0 and related as 
       a.
      b.
      c.
      d.
    • 15. Problem
      13
      Identify the set in which all the three materials are good conductors of electricity  
      Cu, Hg and NaCl
      Cu, Ge and Hg
      Cu, Ag and Au
      Cu, Si and diamond.
    • 16. Problem
      14
       A flow of 107 electrons per second in a conducting wire constitutes a current of
      1.6 x 10-12 A
      1.6 x 1026 A
      1.6 x 10-26 A
      1.6 x 1012 A.
    • 17. Problem
      15
      The current I in an A.C. circuit inductance coil varies with time according to the graph given below.
      Which one of the following graphs gives the variation of voltage with time?
      a.
      b.
      c.
      d.
    • 18. Problem
      16
      A source of frequency v gives 5 beats/second when sounded with a source of frequency 200 Hz. The second harmonic of frequency 2v of source gives 10 beats/second when sounded with a source of frequency 420 Hz. The value of v is
      205 Hz
      195 Hz.
      200 Hz
      210 Hz.
    • 19. Problem
      17
      I A loaded vertical spring executes S.H.M. with a time period of 4 sec. The difference between the kinetic energy and potential energy of this system varies with a period of
      2 sec
      1 sec
      8 sec
      5sec
    • 20. Problem
      18
      Which of the following is simple harmonic motion?
      Particle moving in a circle with uniform speed
      Wave moving through a string fixed at both ends
      Earth spinning about its axis
      Ball bouncing between two rigid vertical walls.
    • 21. Problem
      19
      Ray optics is valid, when characteristic dimensions are
       
      Much smaller than the wavelength of light
      Of the same order as the wavelength of light
      Of the order of one millimeter
      Much larger than the wavelength of light.
    • 22. Problem
      20
      Which of the following electromagnetic radiations have the smaller wavelength ? 
      X-rays
      y-rays
      UV waves
      Microwaves.
    • 23. Problem
      21
      The blue colour of the sky is due to the phenomenon of
       
      Scattering
      Dispersion
      Reflection
      Refraction.
    • 24. Problem
      22
      Which one of the following gates correspond to the truth table given below? 
      NAND
      NOR
      XOR
      OR
    • 25. Problem
      23
      An electric dipole of moment p is placed in the position of stable equilibrium in uniform electric field of intensity E. This is rotated through an angle from the initial position. The potential energy of the electric dipole in the final position is  
      -pEcos
      pE (1- cos )
      pEcos
      pE sin .
    • 26. Problem
      24
      In an adiabatic change, the pressure and temperature of a monatomic gas are related as where C equals
      a.
      b.
      c.
      d.
    • 27. Problem
      25
      For lenses of focal length 15 cm and 150 cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be  
      + 15 cm
      + 150 cm
      150 cm
      -15 cm.
    • 28. Problem
      26
      A stationary wave is represented by where y and A are in millimeters, t is in second and x is meters. The velocity of the wave is
      104 m/s
      not derivable
      1 m/s
      102 m/s
    • 29. Problem
      27
      The oscillating electric and magnetic vectors of an e.m. wave are oriented along 
      Mutually perpendicular directions and are in phase
      Mutually perpendicular directions but has a phase difference of 900
      The same direction and are in phase
      The same direction but have a phase difference of 900
    • 30. Problem
      28
      The displacement –time graph of a moving particle is shown below. The instantaneous velocity of the particle in negative at the point
       E
      F
      C
      D
    • 31. Problem
      29
      A solid spherical ball rolls on a table. Ratio of its rotational kinetic energy to total kinetic energy is
      a.
      b.
      c.
      d. 
    • 32. Problem
      30
      A particle executes S.H.M along x-axis. The force acting on it is given by
      A cos (kx)
      Ae-kx
      Akx
      Akx.
    • 33. Problem
      31
      Two identical balls A and B collide head on elastically. If velocities of A and B, before the collision, are +0.5 m/s and –0.3 m/s respectively, then their velocities, after the collision, are respectively 
      -0.5 m/s and + 0.3 m/s
      + 0.5 m/s and + 0.3 m/s
      + 0.3 m/s and – 0.5 m/s
      -0.3 m/s and + 0.5 m/s.
    • 34. Problem
      32
      A seconds pendulum is mounted in a rocket. Its period of oscillation
      will decrease when rocket is  
      Moving down with uniform acceleration
      Moving around the earth in geostationary orbit
      Moving up with uniform velocity
      Moving up with uniform acceleration. Decline
    • 35. Problem
      33
      A wave of frequency 100 Hz travels along a string towards its fixed end. When this wave travels back, after refection, a node is formed at a distance of 10 cm from the fixed end. The speed of the wave (incident and reflected ) is  
      20 m/s
      40 m/s
      6m/s
      10 m/s.
    • 36. Problem
      34
      A body of mass 5 kg hangs from a spring and oscillates with a time period of 2 seconds. If the ball is removed, the length of the spring will decrease by  
      g/k meters
      k/g meters
      2 meters
      g meters.
    • 37. Problem
      35
      Which one of the following represents a wave?
      a.
      b.
      c.
      d.
    • 38. Problem
      36
      In a rocket, fuel burns at the rate of 1 kg/s. This fuel is ejected from the rocket with a velocity of 60 km/s. This exerts a force on the rocket equal to
       
      6000 N
      60000 N
      60 N
      600 N
    • 39. Problem
      37
      A satellite in force – free space sweeps stationary interplanetary dust at a rate of where M is mass and v is the speed of satellite and is a constant. The acceleration of satellite is  
       a.
      b.
      c.
      d.
    • 40. Problem
      38
      If the gravitational force between tow objects were proportional to 1/R (and not as 1/R2), where R is the distance between them, then a particle in a circular path (under such a force ) would have its orbital speed v, proportional to  
      R
      R0(independent of R)
      1/R2
      1/R.
    • 41. Problem
      39
      The distance of two planets from the sun are 1013 m and 1012 m respectively. The ratio of time periods of the planets is  
      a.
      b.10
      c. 10
      d.1/
    • 42. Problem
      40
      The radius of earth is about 6400 km and that of mars is 3200 km. The mass of the earth is about 10 times mass of mars. An object weighs 200 N on the surface of earth. Its weight on the surface of mars will be
       20 N
      6N
      80N
      40 N
    • 43. Problem
      41
      When a body moves with a constant speed along a circle
       
      No work is done on it
      No acceleration is produced in it
      Its velocity remains constant
      No force acts on it
    • 44. Problem
      42
      The velocity of train increases uniformly from 20 km/h to 60 km/h in 4 hours. The distance traveled by the train during this period is  
      160 km
      180 km
      100 km
      120 km.
    • 45. Problem
      43
      A position dependent force, F = 7 –2x + 3x2 N acts on a small body of mass 2 kg and displaces if from the work done in joules is  
      135
      270
      35
      70.
    • 46. Problem
      44
      A particle moves along a straight line such that its displacement at any time t is given by meters. The velocity when the acceleration is zero is  
      3 m/s
      42 m/s
      -9 m/s
      -15 m/s.
    • 47. Problem
      45
      a boat is sent across a river with a velocity of 8 km/h. If the resultant velocity of boat is 10 km/h, then velocity of the river is
      8km/h
      10km/h
      12.8 km/h
      6 km/h.
    • 48. Problem
      46
      A car accelerates from rest at a constant rate for some time after which it decelerates at a constant rate and comes to rest. If total time elapsed is t, then maximum velocity acquired by car will be
      a.
      b.
      c.
      d.
    • 49. Problem
      47
      The kinetic energy acquired by a mass m in traveling distance d. starting from rest, under the action of a constant force is directly proportional to
      a. m
      b.
      c.
      d.1/
    • 50. Problem
      48
      A body, constrained to move in y-direction, is subjected to a force given by The work done by this force in moving the body through a distance of m along y-axis, is  
      150 J
      20 J
      190 J
      160 J
    • 51. Problem
      49
      The angle between the two vectors and will be
      900
      1800
      zero
      450.
    • 52. Problem
      50
      Which of the following has the dimensions of pressure?
       
      MLT-2
      ML-1T-2
      ML-2T-2
      M-1L-1.
    • 53. For solution visit www.vasista.net

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