1. Inside an aeroplane, flying at a high altitude,

2. Point A is at a lower electrical potential than point B. An electron between them on the line joining them will

3. Intensity of sound at a point is ____ its distance from the source.

4. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit

5. Rainbow is due to

7. Moment of inertia is:

8. Light year is a unit of

9. Stars appears to move from east to west because

10. It is easier to roll a stone up a sloping road than to lift it vertical upwards because

11. The best conductor of electricity among the following is :

12. Sound travels at the fastest speed in

13. What is the value of 1 kW = ?

14. In which of the following industries is mica as a raw material?

15. The fuse in an electric circuit is connected in

16. One should not connect a number of electrical appliances to the same power socket because

17. Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

18. Nuclear sizes are expressed in a unit named

19. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from

20. On a rainy day, small oil films on water show brilliant colours. This is due to

21. Light from the Sun reaches us in nearly

22. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? I. Diffusion II. Refraction III. Internal reflection

23. Railway tracks are banked on curves

24. Find the current (in A) when a charge of 1200C flows in 6 seconds.

25. Magnetism at the centre of a bar magnet is

26. On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because

27. Mirage is due to:

28. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in

29. The earth-wire of a cable is connected to

30. Pa(Pascal) is the unit for

31. Out of the following pairs, which one does not have identical dimension?

33. Stars twinkle because

34. Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

35. Of the following natural phenomena, tell which one known in Sanskrit as ‘deer’s thirst’?

36. Suitable impurities are added to a semiconductor depending on its use. This is done in order to

37. Which of the following terms is not used in the field of physics?

38. Mercury is commonly used as a thermometric fluid rather than water because

39. It is easier to roll a barrel full of coal tar than to pull it because

40. A Fuse wire is characterised by

41. Lightning is caused due to

42. Safety fuse wire used in domestic electrical appliances is made of metal of low

43. Metals are good conductors of electricity because

44. Planets are

45. Lux is the SI unit of

46. Sound waves in air are

47. It is more difficult to walk on a sandy road than on a concrete road because

48. Metals are good conductors of electricity because:

49. Radio telescopes are better than optical telescopes because

50. Materials for rain-proof coats and tents owe their water-proof properties to

51. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

52. When the main switch of the house is put off it disconnects the

53. The absorption of ink by blotting paper involves:

54. The electric current in a metal wire is due to the flow of –

55. Minimum number of unequal vectors which can give zero resultant are

56. Out of the following, which is not emitted by radioactive substance?

57. An electric fuse is based on

58. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

59. Copper wires are generally used for electrical power transmission instead of iron wire because :

60. Which tube used to produce X-ray?

61. Kilowatt-hour is the unit of :

62. Intensity of sound has

63. Rectifiers are used to convert:

64. Radiocarbon is produced in the atmosphere as a result of

65. On a stationary sail boat, air is blown from a fan attached to the boat. The boat

66. Solar eclipse will take place when

67. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?

68. Sound of frequency below 20 Hz is called

69. Mach number is used in connection with the speed of

70. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

71. During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to

72. Identify the vector quantity from the following

73. Optical fibre works on the

74. It takes much longer to cook food in the hills than in the plains, because

75. Supersonic plane fly with the speed

76. Natural radioactivity was discovered by

77. Mica is used in electrical appliances such as electric iron because mica is

78. Stars which appear single to the naked eye but are double when seen through a telescope are

79. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:

81. Siphon will fail to work if:

82. Light travels at the fastest speed in:

83. Superconductors are substances which

84. The unit of electrical power is

85. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?

86. Large astronomical telescopes always use as objective

87. Of the following properties of a wave, the one that is independent of the other is its

88. Pick out the scalar quantity

89. RADAR is used for:

90. Electric power is measured in units of

91. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:

92. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

93. Oil raise up the wick in a lamp. The principle involves

94. Working of safety fuses depends upon 1. magnetic effect of the current 2. chemical effect of the current 3. magnitude of the current 4. heating effect of the current Select the correct answer using the code given below.

95. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is

96. Isotopes of an element contain

97. Radiocarbon dating technique is used to estimate the age of

98. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:

99. Planets do not twinkle because

100. ML2T-2 is the dimensional formula for