1. Light from the Sun reaches us in nearly

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

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

4. Magnetism at the centre of a bar magnet is

5. 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

6. Light year is a unit of

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

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

9. Intensity of sound has

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

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

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

13. Identify the vector quantity from the following

15. Sound waves in air are

16. Nuclear sizes are expressed in a unit named

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

18. Light travels at the fastest speed in:

19. 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

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

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

22. An electric fuse is based on

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

24. 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

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

26. Lightning is caused due to

27. Stars twinkle because

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

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

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

31. The absorption of ink by blotting paper involves:

32. Large astronomical telescopes always use as objective

34. Metals are good conductors of electricity because:

35. Planets are

36. Supersonic plane fly with the speed

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

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

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

40. Rainbow is due to

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

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

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

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

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

46. Lux is the SI unit of

47. RADAR is used for:

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

49. 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:

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

51. 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

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

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

54. Rectifiers are used to convert:

55. Solar eclipse will take place when

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

57. Kilowatt-hour is the unit of :

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

59. 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.

60. Sound of frequency below 20 Hz is called

61. Siphon will fail to work if:

62. Mirage is due to:

63. What is the value of 1 kW = ?

64. The fuse in an electric circuit is connected in

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

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

67. Radio telescopes are better than optical telescopes because

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

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

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

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

72. Railway tracks are banked on curves

73. Superconductors are substances which

74. Planets do not twinkle because

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

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

77. ML2T-2 is the dimensional formula for

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

79. Natural radioactivity was discovered by

80. The unit of electrical power is

81. Isotopes of an element contain

82. Pa(Pascal) is the unit for

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

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

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

87. Optical fibre works on the

88. Sound travels at the fastest speed in

89. Electric power is measured in units of

90. Which tube used to produce X-ray?

91. A Fuse wire is characterised by

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

93. Moment of inertia is:

94. Stars appears to move from east to west because

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

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

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

98. Metals are good conductors of electricity because

99. Pick out the scalar quantity

100. 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?