Brilliance College Model Question Papers of Deputy Collector Examination

Every Day Science : Physics Paper 2


1. Which of the following is a derived unit ?
A. Mass B. Length C. Time D. Velocity

2. Which part of the sun is visible during total solar eclipse
A. corona B. chromosphere C. photosphere D. No part

3. The Father of electricity is :
A. Kamerlingh Onnes B. Issac Newton C. Albert Einstein D. Michael Faraday

4. One horse power is equal to –––– watts.
A. 764 B. 754 C. 745 D. 746

5. A man sitting in a train in motion is facing the engine. He tosses a coin up, the coin falls
behind him. The train is
A. moving forward with uniform speed B. moving backward with uniform speed
C. moving forward with acceleration D. moving forward with deceleration

6. Speedometer of an automobile measures
A. average velocityB. acceleration C. instantaneous speed
D. instantaneous velocity

7. The SI unit of work is
A. Joule B. Watt C. Calorie D. Ampere

8. The study of friction and lubricants is
A. Astrophysics B. Dynamics C. Optics D. Tribology

9. In long jump (distance is measured only horizontally) a person who jumps at an angle ——
—— to ground has greater probability of winning.
A. 450 B. 900 C. 300 D. 600

10. Who proposed atomic theory ?
A. John Dalton B. Neils Bohr C. Chadwick D. Rutherford

11. When ice melts, its volume
A. increases B. decreases C. remains the same
D. first decreases then increases

12. Three primary colours of light are
A. Red, green, blue B. Red, yellow, green C. Red, yellow, blue D. Green, blue, yellow

13. The gravitational pull exerted by the earth is maximum at the
A. South pole B. North pole C. Antartic circle D. Equator

14. Solar eclipse occurs on
A. full moon day B. new moon day C. half moon day D. none of these

15. The foul air we exhale in a room is
A. cooler and hence lighter B. warmer and hence heavier
C. warmer and hence lighter D. cooler and hence heavier

16. Factor which decides the climate of a place
A. Latitudes B. Distance from the sea C. Rotation of the earth
D. Longitude

17. Ozone layer above the earth is between
A. 20 and 35 km B. 60 and 80 km C. 80 and 110 km D. 75 and 100 km

18. The highest science award in India
A. Bhabha award B. C.V. Raman award C. S.S. Bhatnagar award
D. Chanakya award

19. Who invented MASER
A. Charles H. Townes B. Theodore Maiman C. James Harrison
D. Alexander Catlin

20. INSAT – 2C was launched from ——
A. Thumba B. Hanoi C. Kourou Island D. Ottawa

21. The power of an ordinary torch cell is
A. 0.5 V B. 2.5 V C. 1.5 V D. 1.1 V

22. Light year is the unit of
A. time B. speed C. distance D. year

23. The first known source of a magnet was discovered in
A. Asia Minor (Turkey) B. Iran C. Gold Coast D. Bombay high

24. In a Doctor’s stethescope, the sound is intensified because of
A. Resonance of sound B.Constructive interference
C. Principle of super position of waves D. Reflection of sound

25. In colder regions, the thermometer used to measure temperature is
A. wet and dry bulb hygrometer B. Mercury thermometer C. Gas thermometer
D. Alcohol thermometer

26. What type of energy does a compressed spring possess ?
A. Kinetic B. potential C. thermal D. magnetic

27. If the temperature of a patient is 400C, his temperature on the Fahrenheit scale will be
A. 1040F B. 720F C. 960F D. 1000F

28. A simple microscope consists of ———
A. concave lens B. plano concave lens C. convex lens D. cylindrical lens

29. Short sightedness can be corrected by ——
A. convex mirror B. concave lens C. plane mirror D. concave lens

30. When temperature increases, the velocity of sound—
A. increases B. decreases C. will not change
D. increases and then decreases

31. Intensity of a sound is measured in ———
A. Hertz B. Decibel C. miles/second
D. periodicity and regularity

32. Loudness of sound depends upon its ——
A. wave length B. frequency C. amplitude D. overtones

33. Which of the following is most elastic ?
A. Steel B. Glass C. Aluminium D. Rubber

34. In a periodic table, the horizontal rows are called——
A. periods B. groups C. series D. none of the above

35. Photo electric effect was first explained by —
A. Rutherford B. J.J. Thomson C. Bohr D. Einstein

36. Henry Bequeral discovered ––––––
A. field emission B. natural radioactivity
C. Artifical radioactivity D. a, b, and g - rays

37. Control rods used in nuclear reactors are made of ——
A. stainless steel B. graphite C. cadmium D. plutonium

38. 1 Quintal = ———— kilograms
A. 100 B. 1000 C. 10000 D. 10

39. The weight of diamond is determined by an unit called –––––
A. Carat B. Gram C. Litre D. Mohs

40. Under what condition does a lunar eclipse takes place?
A. The earth comes between the sun and the moon
B. The moon comes between the sun and the earth
C. The sun comes between the earth and the moon
D. The sun, moon and earth are in straight line in any order

41. ———— is called the twin planet earth
A. Mars B. Uranus C. Mercury D. Venus

42. Which of the following is uses as a heating element
A. Silver B. Copper C. Nichrome D. Tin

43. Dr. Abdul Kalam was awarded the ‘Bharat Ratna’ in 1997 for
A. Missile Technology B. Nuclear Research C. War gallantry
D. Food Technology

44. The technique used to transmit audio signals in television broadcast is
A. Amplitude modulation B. Frequency modulation
C. Pulse code modulation D.Time division multiplexing

45. Sunlight filtering through a tree often makes circular patches on the ground because
A. the space through which light penitrates B. due to polarization of light
C. due to interference of light D. due to diffraction phenomenon

46. Reflectors used in solar cookers are
A. convex B. concave C. plane D. cylindrical

47. Which one of the following element is seen abundantly in solar system ?
A. Helium B. Hydrogen C. Oxygen D. Nitrogen

48. The working principle of the ink filler is
A. The pressure outside the bottle acts on the filler
B. The expansion of the filler
C. The cylindrical structure of the filler
D. The atmospheric pressure acts on the surface on the ink

49. Dentist’s mirror is a
A. Cylindrical mirror B. Plane mirror C. Convex mirror D. Concave mirror

50. A rainbow is formed by the ——— of light by water droplets
A. disperson B. scattering C. total internal reflection
D. disperson and total internal reflection.

51. National Science Day is observed on 28th February to commemorate
A. Bhabha’s birthday B. The day of declaration of Raman Effect
C. Launching of the first Indian Satellite Aryabhatta
D. Successful launching of PSLV

52. Hypermetropia can be corrected by using ——
A. concave lens B. convex lens C. plano concave lens D. plano convex lens

53. When was the first Atomic Energy Commission set up in India ?
A. August 10, 1948 B. August 12, 1950 C. August 1, 1949 D. August 20, 1951

54. India conducted the first nuclear explosion in the year
A. May 18, 1974 B. May 11, 1998 C. May 13, 1998 D. May 12, 1988

55. Which of the following is the best conductor of electricity?
A. Cold water B. Warm water C. Saline water D. Distilled water

56. Which sector in India uses coal in maximum quantity?
A. Railway B. Thermal plants C. Refineries D. Transport

57. The density of water is maximum in
A. 00C B. 40C C. 250C D. 1000C

58. The farthest object in solar system is
A. Neptune B. Pluto C. Eris D. Ceres

59. Liquified gas under a pressure of 58 atmospheres is
A. Water gas B. Hard water C. Dry ice D. Soft water

60. The sun’s heat and light energy reaches the earth by
A. conduction B. Convection C. reflection D. radiation

61. Where is the National Physical Laboratory situated
A. Puna B. NewDelhi C. Culcutta D. Bangalore

62. Which of the following is a common constituent of transistor ?
A. Silicon B. Copper C. Beryllium C. Iron

63. When common salt is mixed with ice, the freezing point
A. is lowered B. is raised C. remains unaffected
D. is first lowered and then raised

64. As the train starts moving, a man sitting inside leans backwards because of
A. inertia of rest B. inertia of motion C. moment of inertia
D. conservation of mass

65. Water pipes burst in severe winter at hill stations because
A. they contract on cooling B. water in the pipe contracts on freezing
C. water in the pipe expands on freezing D. pipes expand on cooling

66. An aneroid barometer uses
A. mercury B. alcohol C. distilled water
D. doesn’t use any liquid

67. The ink of the pen leaks out in an aeroplane because
A. atmospheric pressure increases
B. pressure of ink inside is more than the ambient pressure
C. high speed of aeroplane D. temperature difference

68. Perspiration is maximum when temperature is
A. high and air is humid B. high and air is dry
C. low and air is humid D. low and air is dry

69. Sound travels fastest in
A. air B. water C. vacuum D. steel

70. A periscope works by the principle of
A. diffraction B. reflection and interference
C. reflection and refraction D. refraction only

71. An air bubble in water shines because of the phenomenon of
A. reflection B. refraction C. diffraction
D. total internal reflection

72. The pitch of the voice of women is in general
A. higher than that of men B. marginally lower than that of men
C. the same as that of men
D. Some times higher and sometimes lower than that of men

73. A noise level of 20 decibels would correspond to
A. ordinary conversation B. whispering C. Machine sound
D. Supersonic plane’s sound

74. To detect the over speeding vehicles, police use
A. Diffraction of short radio waves B. Refraction of short radio waves
C. Doppler effect of reflected short radio waves
D. Reflection and refraction of short radio waves

75. A choke is fitted along with fluorescent tubes. The choke coil,
A. steps up the line voltage B. steps down the line voltage
C. reduces current in the circuit D. vanishes the low frequency currents

76. The transmission of heat without any carrier in between is
A. conduction B. convection C. refraction D. radiation

77. Atom bomb was discovered by
A. Edward Teller B. Madam Curie C. Baird D. Otto Hahn

78. Which law of Newton defines inertial frames ?
A. First law B. Second law C. Third law D. Both (A), (B) and (C)

79. From the point of view of wave motion, a ray can be defined as an imaginary line draw in
the direction in which
A. the wave is travelling B. the wave is reflected
C. the ray is refracted D. Name of the above

80. A person can view his full-length image in a mirror that is at least ——— his height
A. one-fifth B. one-fourth C. one-third D. half

81. The vacuum in a thermos bottle minimizes heat transfer by
A. Conduction B. Convection C. Radiation D. Absorption

82. What is the colour of the black box kept in the cockpit of an aeroplane ?
A. Orange B. Black C. White D. Red

83. With increase of humidity, the velocity of sound in air
A. decreases B. increases C. fluctuates irregularly D.remains unaffected

84. With increase of height from the surface of the earth the value of ‘g’
A. increases B. decreases C. remains constant D. fluctuates

85. A gyrostatic compass is used in
A. aeroplanes B. ships C. submarines D. All of the above

86. What is the unit of current ?
A. watt B. volt C. Ampere D. Coulomb

87. The net weight of LPG in a domestic gas cylinder supplied is
A. 14.2 kg B. 14 kg C. 15.2 kg D. 15 kg

88. The phenomenon of ———— has been used to test the planeness of surfaces and also to
reduce reflecting power of the lens and the prism surfaces
A. diffraction B. interference C. polarization D. none of the above

89. A thermodynamic system is one which can be described in terms of
A. temperature B. volume C. introphy
D. thermodynamic co-ordinate

90. The process by which solids directly change to gaseous state is
A. Diffusion B. condensation C. Sublimation D. Vapourisation

91. The technique in which 3-dimentional picture of an object can be obtained is
A. LASER B. Holography C. Photography
D. Optical interferrometry

92. Which one of the following is used by the motorist to see the road behind him
A. concave mirror B. convex mirror C. concave lens D. convex lens

93. An astronaut on an earth satellite will observe the sky as
A. deep red B. sky blue C. black D. deep blue

94. The image formed on the retina of the human eye is
A. imaginary and upright B. imaginary and inverted
C. real and upright D. real and inverted

95. The lowest temperature is recorded
A. at midnight B. just after sun rise C. just before sun rise
D. between 4 pm and 5 pm

96. The energy possessed by the water collected in the reservoir of a dam
A. Kinetic energy B. Mechanical energy C. Electric energy D. Potential energy

97. The most important raw material for generation of power in India
A. Uranium B. Thorium C. Radium D. Coal

98. India’s first tactical surface-to surface missle was —
A. Agni B. Trishul C. Prithvi D. Insat – IB

99. ISRO Satellite Centre is at
A. Thiruvananthapuram B. Bangalore C. Sriharikota
D. Trombay

100.An instrument which indicates altitude of a place along with corresponding pressure
A. Anemometer B. Barometer C. Hygrometer D. Altimeter

Answers

1 D; 2 A;  3 D;  4 D;  5 C;  6 C;  7 A;  8 D; 9 A; 10 A; 11 B; 12 A; 13 D; 14 B; 15 C; 16 A; 17 A; 18 C; 19 A; 20 C; 21 C; 22 C; 23 A; 24 D; 25 D; 26 B; 27 A; 28 C; 29 B; 30 A; 31 B; 32 C; 33 B; 34 A; 35 D; 36 B; 37 C; 38 A; 39 A; 40 A; 41 D; 42 C; 43 A; 44 B; 45 D; 46 B; 47 B; 48 D; 49 D; 50 D; 51 B; 52 B; 53 A ;54 A; 55 C; 56 B; 57 B; 58 C; 59 C; 60 D; 61 B; 62 A; 63 A; 64 A; 65 C; 66 D; 67 B; 68 A; 69 D; 70 C; 71 D; 72 A; 73 B; 74 C; 75 A; 76 D; 77 D; 78 A; 79 A; 80 D; 81 B; 82 B; 83 B; 84 B; 85 D; 86 C; 87 A; 88 B; 89 D; 90 C; 91 B; 92 B; 93 C; 94 D; 95 C; 96 D; 97 D; 98 C; 99 B; 100D

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Deputy Collector Examination - Model Question Papers 01

Are you searching for model question papers of Deputy Colletor Examinations? Okay, here is the right place to  get the model question papers prepared by Brillaince College.


Every Day Science : Physics  Paper 1

1. Who had invented wireless telegraph?
A. J.L.Baird B. Alfred Nobel C. Marconi D. Waterman

2. Who discovered X-Rays?
A. Brequet B. James Watt C. Cavendish D. Roentgen

3. A Photometer is used for the determination of :
A. Altitudes B. Electric Potential
C. Specific gravity D. Intensity of illumination

4. Quantum Theory was discovered by:
A. J. Priestly B. Marconi C. Max Plank D. W.K.Roentgen

5. Which was associated with Fermi?
A. South Pole B. Atomic Bomb C. Wireless Telegraph D. Raman Effect

6. The element of an electric heater is made of :
A. Brass B. Copper C. Iron D. Nichrome

7. The audiable frequency of human ear is between 20 hertz and –––––hertz
A. 20000 B. 15000 C. 2000 D. 200

8. What does a voltmeter measure?
A. Current B. Potential difference C. Resistance D. None of these

9. How does a yellow flower look in red light?
A. Black B. Red C. Orange D. White

10. Two solid bodies A and B float in water. It is observed that A floats with 2/3 of its volume
immersed while B floats with 3/4 of its volume immersed. The densities of A and B are in
the ratio:
A. 9:8 B. 8:9 C. 2:3 D. None of these



11. If the distance between two bodies is halved, the force of gravitation:
A. Decreases slightly B. Remains unchanged
C. Becomes double the previous value D. Becomes four times the previous value

12. The Moon is kept in orbit due to a balance between:
A. Centripetal force and gravitational force
B. Earth’s attraction and Sun’s attraction
C. Centrifugal force and gravitational force
D. None of these

13. The kind of energy stored in a dam is:
A. Heat energy B. Kinetic energy C. Potential energy D. None of these

14. Which is most elastic?
A. Copper B. Steel C. Glass D. None of these

15. Law of Electrolysis was discovered by:
A. Snell B. Faraday C. Dalton D. Kepler

16. Alcohol is used as a thermometric liquid when it is desired to measure:
A. Low temperatures B. High temperatures
C. Very high temperatures D. None of these

17. Water pipes are apt to burst in cold weather because:
A. They contract due to cold weather
B. They expand due to cold weather
C. The water in the pipe cannot evaporate
D. The water in the pipe turns into ice and expands

18. Humidity in air is measured by:
A. Hygrometer B. Hydrometer C. Manometer D. Anemometer

19. Why does ice in sawdust not melt quickly?
A. Sawdust does allow the air to touch the ice
B. The water is absorbed by sawdust
C. Sawdust is a Bad Conductor of heat
D. None of these

20. Why is the rainbow seen after rainfall?
A. There are certain gases after rain
B. As the light passes through rain drops it under goes disperion
C. The atmosphere is clear by rain
D. As the atmosphere is clear light undergoes reflection

21. Grass look green because:
A. It is by nature
B. It reflects green colour
C. It absorbs all the colours of white light except green
D. None of these

22. The weight of a man at the surface of the moon will be only about one-sixth of his weight
on the earth because:
A. Moon has no atmosphere
B. The gravity of moon is about that much less (one-sixth as compared to that of the earth)
C. Moon is very far off from the earth
D. The moon is six times smaller than earth

23. Which one, out of cold, boiling or warm water is a better fire extinguisher?
A. Warm water B. Cold water C. Boiling water D. None of these

24. We can see things more clearly at night when we:
A. Look slightly, below the thing B. Look directly the thing
C. Look out of the side of the eye D. None of these

25. Balloons are filled with hydrogen on account of:
A. Its being colourless B. Its being odourless
C. Its extreme lightness D. None of these

26. Acoustic is the science dealing with the study of:
A. Light B. Space C. Sound D. None of these

27. At which location on the earth will the same object weigh the least?
A. South Pole B. North Pole C. Equator D. None of these

28. Safety match was invented by:
A. Landstrom B. Wilson C. Perkin D. None of these

29. The instrument which measures depth of the ocean is called:
A. Fathometer B. Gravimeter C. Galvanometer D. Altimeter

30. The name of the instrument used for recording sound under water is:
A. Gravimeter B. Hydrometer C. Hydrophone D. Hygrometer

31. Radio Activity was discovered by:
A. Henry Becquerel B. Rutherford
C. Edward Jenner D. Madam Curie

32. The SI unit of temperature is:
A. Kelvin B. Celsius C. Centigrade D. Fahrenheit

33. .......is not used for the production of atomic energy:
A. Radium B. Uranium C. Thorium D. Barium

34. Black Holes are celestrial bodies which have a strong force:
A. Electric B. Magnetic C. Gravitational D. Cosmic

35. X-rays cannot penetrate through
A. Wood B. Aluminium C. Lead D. Iron

36. Light year is the unit of:
A. Velocity B. Distance C. Light D. Time

37. When ion rusts, its weight:
A. Increases B. Decreases
C. Remains the same D. First increases and then decreases

38. ......energy causes least pollution.
A. Solar B. Thermal C. Nuclear D. Chemical

39. Cosmology deals with:
A. Cosmetics B. Medicine C. Universe D. Satellites

40. ........ is not a primary colour.
A. Red B. Blue C. Green D. Yellow

41. The instrument used for detection and measurement of electric current is:
A. Voltmeter B. Galvanometer C. Wattmeter D. Anemometer

42. The lowest temperature theoretically possible is:
A. -278°C B. -273°C C. -270°C D. -237°C

43. Alfred Nobel invented the:
A. Atom bomb B. Machine gun C. Dynamite D. Dynamo

44. The equatorial radius is ....... miles.
A. 3,963 B. 3,693 C. 3,669 D. 3,369

45. If a red object is seen in blue light, it will:
A. Violet B. Red C. Green D. Black

46. Time taken by sunlight to reach the earth is:
A. 15 sec B. 8 sec C. 15 min D. 8 min

47. EEG is related to the:
A. Brain B. Heart C. Eyes D. Kidneys

48. In normal condition, the pace maker of heart is in the :
A. Lymph node B. AV node C. Sinoatrial node D. Sinus Venosus

49. Selenology is the study of:
A. Selenium B. Moon C. Venus D. Mars

50. .........records the intensity of earthquake.
A. Electrograph B. Oscilloscope C. Seismograph D. Spectrograph

51. The minimum velocity required to escape from the earth’s gravitational field is ......km/sec.
A. 11.9 B. 11.2 C. 11.6 D. 11.4

52. What’s the Avagadro’s number?
A. 6.023×1021 B. 6.023×1023 C. 6.023×10° D. 6.023×1025

53. Einstein was awarded the Nobel Prize for (the):
A. Theory of Relativity B. Einstein shift
C. Photoelectric effect D. E = MC2

54. A sudden fall in barometeric pressure indicates:
A. Rain B. Storm C. Hot weather D. Clear sky

55. Unit of work is:
A. Joule B. Dyne C. Pound D. Newton

56. Which day is celebrated as Science Day?
A. September 5th B. November 14th C. February 28th D. None of these

57. Cylindrical lens is used to correct:
A. Myopia B. Astigmatism C. Hypermetropia D. Colour blindness

58. Isotopes of an element have the same:
A. Atomic mass B. Atomic number C. Density D. Atomic weight

59. Who discovered the elivator?
A. Madam Curie B. Einstein C. Elisa Ottis D. Roentgen

60. Which statement is wrong?
A. Iron sinks in water B. Wood floats in water
C. Mercury floats in water D. Iron floats in mercury

61. The instrument for measuring curvature of surface is:
A. Spherometer B. Sphygmo manometer
C. Sphygmoscope D. Spectrometer

62. The instrument for measuring the altitude of the sun is called:
A. Spectrometer B. Sextant C. Spherometer D. Altimeter

63. Which one of the following does a TV remote control unit use to operate a TV set?
A. Light waves B. Sound waves C. Radio waves D. Infrared waves

64. Persistence of vision is the principle behind
A. camera B. spectroscope C. cinema D. periscope

65. The weight of a body is
A. the same everywhere on the surface of the earth
B. maximum at the poles
C. maximum at the equator
D. more on the hills than in the plains

66. Ball pen works on the principle of
A. Viscosity B. Boyle’s law
C. Gravitational force D. Capillarity and surface tension

67. At what temperature a body will not radiate any heat energy?
A. 0°C B. 273°C C. -4°C D. -273°C

68. A telescope and a microscope differ in that
A. both are different instruments
B. telescope has eyepiece with larger focal lengths than the objective
C. telescope has objective of large local lengths and eyepiece of smaller focal lengths.
D. None of these

69. The apparatus used in submarines to give clear view of the objects on the surface of the
ocean or ground is known as
A. periscope B. sectant C. stereoscope D. telescope

70. Which metal is commonly used for making an electromagnet?
A. copper B. iron C. nickel D. cobalt

71. Choke is used to
A. reduce high frequency components of electric signal
B. reduce the low frequency components of electric signal
C. convert AC to DC
D. convert DC to AC

72. The ozone layer protects us from
A. ultra violet rays B. radiowaves C. visual radiation D. infrared radiation

73. An example for second order lever is –––––.
A. Lime Sequeser B. Nail puller C. Ballance D. lu tongs

74. Growth of the baby in the uterus is found using
A. X-rays B. Gamma rays C. Ultra sound D. Ultra violet rays

75. The weather map telecast in T.V.is photographed by the satellite orbitting a height of
A. 36,000 k.m. B. 3,600 k.m. C. 3,600 miles D. 360 k.m.

76. The unit of force is –––––.
A. newton B. joule C. coulomb D. dioptre

77. The shining particles seen in the path of beem from a projector in cinema hall is due to
A. shining particles emanating from projector
B. scattering of light by dust particles in the path of the light
C. brownian movement of the dust
D. electrical properties of dust particles

78. “Decibal” is a unit of
A. sound intensity B. light C. heat D. electricity

79. An example of semi-conductor is
A. German silver B. Germanium C. Phosphorus D. Arsenic

80. Unit of charge is
A. Coulumb B. Faraday C. Ampere D. Volt

81. Atom bomb work for the principle of
A. Nuclear fission B. Nuclear fusion C. Newton’s law D. Faraday’s law

82. Four electro magnetic waves of different wave lengths are given. X-rays, Microwaves,
Ultraviolet, Infrared. Their correct arrangement in the descending order of wave length is
A. X-rays, Ulttraviolet, Infrared and Microwaves
B. Microwaves, Infrared Ultraviolet and X-rays
C. Ultraviolet, Infrared, X-rays and Microwaves
D. Microwaves, X-rays, Infrared and Ultraviolet

83. When light enters a lens (glass) there is a change in
A. wave length B. frequency C. velocity D. both (A) and (C)

84. Hydrogen bomb is based on the principle of
A. Nuclear fusion B. Nuclear fission C. Chemical reaction D. Chain reaction

85. When a wave goes from one place to another it transports
A. matter B. energy C. mass D. nothing

86. A 100 watt bulb will consume one unit of electrical energy in
A. 1 hour B. 10 hours C. one day D. 60 hours

87. The solar system belongs the galaxy called
A. Andromeda nebula B. Milky way
C. Radio galaxy D. Magellanic cloud

88. Which one of the following layers of the atmosphere is responsible for the reflection of

radio waves?
A. troposphere B. stratosphere C. mesosphere D. ionosphere

89. Television was discovered by
A. Becquerrel B. H.J.Bhaba C. Bohr D. J.L. Baird

90. On adding a little antimony to germanium, we get
A. P-type semiconductor B. N-type semiconductor
C. metallic conductor D. intrinsic semiconductor

91. Consider the statements: X - rays
I. are not electromagnetic radiations II. are electromagnetic radiations
III. have longer wave lengths IV. have shorter wave lengths
Of these statements:
A. I and III are correct B. I and IV are correct
C. II and IV are correct D. II and III are correct

92. Which of the following waves / rays are produced by nuclear changes in the atom?
A. infrared rays B. lights waves C. x-rays D. g -rays

93. Aritifical satellites are used for
A. TV transmissionB. Detecting minerals C. Space research D. All the three

94. Sound travels at maximum speed in
A. vacuum B. air C. water D. steel

95. The minimum lengths of a plane mirror in which a person can see himself in full length
should be
A. equal to the person’s height B. Slightly more than his height
C. nearly half of his height D. nearly one fourth of his height

96. If you walk towards a plane mirror at a speed of 1m/s at how fast do you and your image
approach each other?
A. 5 m/s B. 2 cm/s C. 1 m/s D. 4 m/s

97. The normal temperature of human body on the kelvin scale is
A. 280 B. 290 C. 310 D. 340

98. Electron microscopy is advantageous because
A. much greater resolution is possible
B. electrons are used as a source of radiation
C. transmission and scanning types are available
D. all the above mentioned features are combined

99. The phenomenon which cannot be explained by wave theory is
A. reflection B. refraction
C. photo electric emission D. polarisation

100.The half life of a radioactive sample is 20 minutes. What fraction of the sample will remain
undecayed after 80 minutes?
A. 1/16 B. 1/12 C. 1/8 D. 1/4

Answers

1. C 2. D 3. D 4. C 5. B 6. D 7. A 8. B 9. C 10. B 11. D 12. A 13. C 14. C 15. B 16. A 17. D 18. A 19. C 20. B 21. C 22. B 23. C 24. C 25. C 26. C 27. C 28. A 29. A 30. C 31. A 32. A 33. D 34. C 35. C 36. B 37. A 38. A 39. C 40. D 41. B 42. B 43. C 44. A 45. D 46. D 47. A 48. C 49. B 50. C 51. B 52. B 53. C 54. B 55. A 56. C 57. B 58. B 59. C 60. C 61. A 62. B 63. D 64. C 65. B 66. D 67. D 68. C 69. A 70. B 71. A 72. A 73. A 74. C 75. A 76. A 77. B 78. A 79. B 80. A 81. A 82. B 83. D 84. A 85. B 86. B 87. B 88. D 89. D 90. B 91. C 92. D 93. D 94. D 95. C 96. B 97. C (370C, 98.60F) 98. A 99. C 100.A

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