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AFMC Physics 2001 Presentation Transcript

  • 1. AFMC–Past papers
    PHYSICS- UNSOLVED PAPER - 2001
  • 2. SECTION – A
    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. Problem
    01
    A body is being rotated in a horizontal circle with constant angular velocity. Which of these is always constant?
    Velocity
    Acceleration
    Force
    Kinetic energy
  • 4. Problem
    02
    A sphere thrown from a flying aero plane shows path
    Parabolic
    Circular
    Straight line
    Spiral
  • 5. Problem
    03
    Pascal second is a unit of
    Energy
    Young's modulus
    Stress
    viscosity
  • 6. Problem
    04
    A body is dropped from an aero plane flying horizontally at 250 km/'hr at an altitude of 980 m. Time of fall is
    10 seconds
    12 seconds
    14.15 seconds
    17.33 seconds
  • 7. Problem
    05
    Which of these travels in the glass with minimum velocity?
    Violet light
    Green light
    Yellow light
    Red light
  • 8. Problem
    06
    Two soaps A and B are given. Dimensions of B are 50% more each than dimension of A. Soap content of B as compared to A is
    1.5
    2.25
    3.375
    4
  • 9. Problem
    07
    A wire is stretched so that its radius becomes one-third of the original value. The value of resistance as compared to original volume is
    9 : 1
    27 : 1
    81 : 1
    3 : 1
  • 10. Problem
    08
    Which of these waves can be polarized?
    Sound waves
    Longitudinal waves on a string
    Transverse waves on a string
    Light waves
  • 11. Problem
    09
    A body of mass 2 kg falls from a height of 20 m. What is the loss in potential energy? ( g = 10 ms-2)
    400 J
    300 J
    200 J
    100 J
  • 12. Problem
    10
    Weight of a body is maximum at
    Pole
    Equator
    Centre of earth
    Moon
  • 13. Problem
    11
    A simple pendulum is taken to a height and thrown so that its falls freely under gravity. Then its frequency of oscillation becomes
    Doubles
    Halves
    Zero
    Uncertain
  • 14. Problem
    12
    Induced e.m.f. is the rate of change of magnetic flux is a statement of
    Pascal's law
    Faraday's law
    Coulomb's law
    Lenz's law
  • 15. Problem
    13
    Distance of a geostationary satellite from the surface of earth is
    6R
    7R
    5 R
    3R
  • 16. Problem
    14
    Current carriers in metals are
    Electrons
    -ve ions
    +ve ions
    Protons
  • 17. Problem
    15
    Unit of gravitational potential is
    Joule
    Joule/kilogram
    Joule kilogram
    Kilogram
  • 18. Problem
    16
    Magnetism of a magnet is due to
    Cosmic rays
    Large magnet at the centre of earth
    Spins of electrons
    Gravitation
  • 19. Problem
    17
    A freely suspended bar magnet aligns itself in
    A direction
    A particular direction
    Any direction
    Depends on mass of the magnet
  • 20. Problem
    18
    Spherical shape of a water drop is due to
    Surface tension
    Adhesion
    Gravity
    Density
  • 21. Problem
    19
    When an electron-beam is incident on a metal target, then the intensity of X-rays produced depends on which property of incident electron beam?
    Wavelength
    Energy
    Velocity
    Number of electrons
  • 22. Problem
    20
    A 100 m long train crosses a man travelling at 5 km/hr, in opposite direction, in 7.2 seconds then the velocity of train is
    40 km/hr
    25 km/hr
    20 km/hr
    45 km/hr
  • 23. Problem
    21
    Who wrote the book "Principia"?
    Maxwell
    Marconi
    Newton
    Einstein
  • 24. Problem
    22
    The half life of an element is 160 days. What amount of it will be decayed in 800 days?
    1/32
    1/16
    1/2
    1/8
  • 25. Problem
    23
    What is the time taken by the moonlight to reach earth?
    8 sec
    10 sec
    9 sec
    None of these
  • 26. Problem
    24
    What is the time taken by moon to complete one revolution of the earth?
    29 days
    20 1/2days
    30 days
    30 1/2 days.
  • 27. Problem
    25
    The temperature on Celcius scale is 25°C. What is the corresponding temperature on the Fahrenheit scale?
    40°F
    77°F
    50°F
    45°F
  • 28. Problem
    26
    23592X->20782Y
    How many alpha and beta particles are emitted in the above reaction?
    3α, 4β
    7α, 4 β
    4α, 7β
    7α, 2β
  • 29. Problem
    27
    What is ozone hole?
    Hole in the ozone layer
    Formation of ozone layer
    Thinning of ozone layer in troposphere
    Reduction in ozone thickness in stratosphere
  • 30. Problem
    28
    To an astronaut in space the sky will appear as
    Blue
    Black
    Violet
    Dark blue
  • 31. Problem
    29
    Hydraulic brakes work on the principle of
    Pascal's Law
    Thomson's law
    Newton's law
    Bernouli'stheorem
  • 32. Problem
    30
    The heating effect of atmosphere is due to
    Ultraviolet rays
    Infrared rays
    Carbon dioxide
    Both (b) and (c)
  • 33. Problem
    31
    C.V. Raman got Nobel Prize for his experiment on
    Dispersion of light
    Reflection of light
    Deflection of light
    Scattering of light
  • 34. Problem
    32
    Dalton's atomic theory was in accordance with
    Conservation of energy
    Conservation of mass
    Conservation of charge
    None of these
  • 35. Problem
    33
    Initially a body is at rest. If its acceleration is 5 ms-2, then calculate the distance travelled in the 18th second?
    86.5 m
    87.5 m
    88 m
    89 m
  • 36. Problem
    34
    If a bomb blasts in air and is broken into several pieces, then the path travelled by centre of mass will be
    Parabolic
    Straight line
    Circular
    Zig-zag
  • 37. Problem
    35
    Big waves of sea due to earthquakes are called
    Tornado
    Hurricane
    Zizyphy
    Tsunami
  • 38. Problem
    36
    Ohms law is not applicable for
    Insulators
    Semiconductors
    Arc lamp
    All of the above
  • 39. Problem
    37
    Newton gave corpuscular theory on the basis of
    Newton's rings
    Rectilinear motion
    Certain corpuscles
    Wave front
  • 40. Problem
    38
    Water is used to cool radiators of engines, Because
    Of its lower density
    It is easily available
    It is cheap
    It has high specific heat
  • 41. Problem
    39
    Brakes of very small contact area are not used although friction is independent of area, because friction
    Resists motion
    Causes wear and tear
    Depends upon nature of the materials
    Operating in this case is sliding friction
  • 42. Problem
    40
     Which of the following is a consequence of conservation of energy?
    Archimedes's principle
    Pascal's law
    Bernoulli's theorem
    Torricelli's theorem
  • 43. Problem
    41
    Which is a vector quantity?
    Magnetic field intensity
    Magnetic field
    Magnetic flux
    Flux density
  • 44. Problem
    42
    Particle that travels with a speed greater than that of light is
    Lepton
    Peon
    Meson
    None of these
  • 45. Problem
    43
    The equipment which has both primary and secondary coils wound over a single core is
    Resistor
    Transistor
    Radio
    Transformer
  • 46. Problem
    44
    Power has transmitted at a high voltage in supply line so as to
    Deliver more power
    Supply more current
    Produce more energy
    Prevent heat loss
  • 47. Problem
    45
    Which one is not correctly matched?
    Temperature - thermometer
    Atmospheric pressure - barometer
    Water in milk - lactometer
    Humidity - calorimeter
  • 48. Problem
    46
    Surface tension is due to
    Elastic force
    Gravitational force
    Adhesive force
    Cohesive force
  • 49. Problem
    47
    The efficiency of a Carnot engine working between 800 K and 500 K is
    0.625
    0.375
    0.4
    0.5
  • 50. Problem
    48
    When a tuning fork vibrates, the waves produced in the fork are
    Longitudinal
    Transverse
    Progressive
    Stationary
  • 51. Problem
    49
    The most important characteristics of electron in the production of X-Rays is
    Revolution of electron around the nucleus
    Mass of electron
    Charge of electron
    Speed of electron
  • 52. Problem
    50
    On mixing soluble salt in water, the surface tension of water will
    Decrease
    Increase
    Becomes zero
    Becomes infinity
  • 53. For solution visit www.vasista.net