2. Flemings right hand rule is used to find the direction of the –
Correct : C. Induced current
3. What is the full form of 'AM' regarding radio broadcasting?
Correct : D. Amplitude Modulation
4. Bar is a unit of which one of the following?
Correct : C. Pressure
5. Bolometer is used to measure –
Correct : B. Temperature
6. Supersonic plane fly with the speed -
Correct : C. greater than the speed of sound
7. If input frequency of a full wave rectifier be n, then output frequency would be-
Correct : D. 2n
8. Heat transfer horizontally within the atmosphere is called –
Correct : D. Advection
9. The phenomenon of light associated with the appearance of blue colour of the sky is –
Correct : D. Scattering
10. Air coolers are more suitable for –
Correct : B. hot and dry climate
11. Who enunciated the laws of planetary motion?
Correct : B. Johannes Kepler
12. The radiant energy having lowest energy is –
Correct : D. microwave radiation
13. When water is heated from 0°C to 10°C. Its volume
Correct : D. first decreases and then increases
14. A force may change of an object.
Correct : D. All options are correct
15. Natural radioactivity was discovered by -
Correct : C. Henri Becquerel
16. A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?
Correct : C. Sphere
17. The 'Abolition of Titles' is a fundamental right classified under:
Correct : C. Right to equality
18. A player making a long jump is an example of .
Correct : A. Projectile motion
19. Which of the following is arranged in order of decreasing conductivity?
Correct : D. Silver, Copper, Aluminium, Steel
20. Which of the following liquids is most viscous?
Correct : A. Oil
21. Which one of the following has the highest value of specific heat?
Correct : D. Water
22. When hot-water is sprinkled on a hotter glass tumbler, it breaks because –
Correct : B. glass suddenly contracts
23. Electricity is transmitted over long distances –
Correct : B. there is less wastage of energy
24. If in a motion, the axis of the rotation passes through an object, then the motion is called.
Correct : C. Spin motion
25. Of the following properties of a wave, the one that is independent of the other is its
Correct : A. amplitude
26. Noise is measured in –
Correct : D. Decibel
27. If ice floating on water in a vessel melts, the water level in the vessel .
Correct : B. does not change
28. ATM stands for –
Correct : A. Automatic Teller Machine
29. The first synthetic fibre made by man was-
Correct : B. Nylon
30. Compared to fresh Water, the freezing point of sea water is -
Correct : B. Lower
31. Which colour is the complementary colour of yellow?
Correct : A. Blue
32. Which of the following produces more severe burns?
Correct : C. Steam
33. The sudden fall of atmospheric pressure indicates –
Correct : B. storm
34. The energy emitted by the Sun is due to
Correct : C. Nuclear fusion
35. The sky appears blue because of –
Correct : B. Scattering of light
36. The metal whose electrical conductivity is more, is –
Correct : C. silver
37. What happens to a liquid, when the vapour pressure equals the atmospheric pressure?
Correct : B. The liquid boils
38. Why do brads not have respiratory trouble at the time of flying at high all?
Correct : C. They have extra air sacs
39. The temperature which has the same reading on both Fahrenheit and Celsius scales is –
Correct : B. -40°
40. Kilowatt-hour is the unit of :
Correct : A. Energy
41. In nuclear reactor, heavy water is used as –
Correct : C. moderator
42. Tear gas used by the police to disperse the mob contains –
Correct : B. chlorine
43. Mist is caused by –
Correct : C. water vapour at low temperature
44. The ozone layer in the atmosphere is at a height of about .
Correct : B. 50 km
45. The part of the eye having the larges refractive index is :
Correct : C. lens
46. Conversion of heat into electrical er is achieved by using –
Correct : D. Thermocouple
47. The filament of electric bulb is made of
Correct : C. Tungsten
48. Necessary element of change in solar energy to electric energy –
Correct : B. Silicon
49. Electric current in a metal wire is due to the flow of —
Correct : A. Electrons
50. Which type of reaction produces the most harmful radiation?
Correct : B. Fission reaction
51. Optic fibres are used in :
Correct : D. Endoscopy
52. Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
Correct : A. 1.0
53. While catching a ball, a player pulls down his hands to lower the –
Correct : B. momentum
54. A camera uses a to form an image on a piece of film at the back.
Correct : A. convex lens
55. In 1866, John Newlands, an English scientist, arranged the then known elements in the order of increasing atomic masses. He found that every eighth element had properties similar to that of the first. He called it the -
Correct : C. Law of Octaves
56. Which of the following pairs of physical quantities have the same dimensions?
Correct : C. Work and Energy
57. Magnetism in materials is due to -
Correct : B. circular motion of electrons
58. The outermost layer of the Sun is called
Correct : C. corona
59. During washing of clothes, we use indigo due to its –
Correct : B. Proper pigmental composition
60. Watt is a unit of -
Correct : B. Power
61. Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in -
Correct : B. Convection
62. Water drops are spherical because of -
Correct : D. surface tension
63. If the temperature of a piece increases suddenly, the relative humidity–
Correct : B. decreases
64. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?
Correct : C. No change will happen
65. Curie point is the temperature at which
Correct : B. A metal loses magnetic properties
66. Which of the following is true regarding Newland’s Law of Octaves?
Correct : C. Both are correct
67. When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of -
Correct : A. surface tension
68. The material used in the fabrication of a transistor is –
Correct : C. Silicon
69. If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?
Correct : A. Increases
70. The velocity of sound is more in –
Correct : C. steel
71. Radio activity is due to –
Correct : A. unstable nucleus
72. Which conservation principle is applicable in the case of the motion of a rocket?
Correct : C. Conservation of momentum
73. These waves cannot be trans-mitted through vacuum –
Correct : B. Sound
74. A gap is left between two rails of a railway track to accommodate of the metal.
Correct : C. liner expansion
75. If an ordinary glass tube and a glass capillary tube are 'both clipped in a beaker of water, water rises in –
Correct : A. both
76. Optical fibres are based on the phenomenon of –
Correct : D. Total Internal Reflection
77. Who was the inventor of frozen foods?
Correct : B. Clarence Birdseye
78. The clouds float in the atmosphere because of their low:
Correct : D. density
79. A person is hurt on kicking a stone due to –
Correct : C. Reaction
80. The fuse in our domestic electric circuit melts when there is a high rise in –
Correct : B. Current
81. The energy stored in a watch spring is
Correct : B. Potential energy
82. Cryogenic is a science deals with -
Correct : D. Low Temperature
83. `Short-sight' in human eye can be corrected by using proper –
Correct : B. concave lens
84. What is the reason for twinkling of stars?
Correct : D. Atmospheric refraction
85. Which gas is used in filling electric bulbs -
Correct : B. Argon
86. Ball pen functions on the principle of :
Correct : D. Surface tension
87. A man cannot see clearly beyond 10 meters. The disease he suffers from :
Correct : B. Myopia
88. The S.I. unit of electric charge is –
Correct : B. coulomb
89. Light beam which is highly directional is called:
Correct : D. laser
90. Permissible noise level at Residential area during night time is :
Correct : A. 45 dB
91. When milk is churned, the cream separates from it clue to:
Correct : B. Centrifugal force
92. Moving electric charge produces -
Correct : A. magnetic field
93. The process of union of two or more molecules of a substance to form a large single molecule is called :
Correct : C. Polymerization
94. When a barometer reading suddenly recedes, it indicates that climate –
Correct : B. will be extremely stormy
95. Which colour of light shows maximum deviation when passed through a prism?
Correct : C. Violet
96. The best material for the core of a transformer is –
Correct : D. soft iron
97. Electron microscope was invented by –
Correct : A. Knoll and Ruska
98. Hydrogen bomb is based on the principle of -
Correct : D. Nuclear fusion
99. The period of revolution of a geo- stationary satellite is –
Correct : C. 24 hours
100. The device which converts sound energy into electrical enemy is called –