General Science Physics -6

76. A type of stone that can float on water:

(a)Marble         
(b) Limestone       
(c) Pumice stone        
(d) Gem stone

Answer: (c)

77. The expected energy of electrones at absolute zero is called:

(a)Work function                    
(b) Potential energy

(c) Emission energy                
(d)  Fermi Energy

Answer: (d)

78. The freezer in a refrigerator is fitted near the top:

(a) to keep it away from the heat compressor which is near the bottom

(b) because of convenience

(c) so that it can cool the whole interior by setting up convection currents

(d) without any specific purpose

Answer: (c)

79. Voyager I is related to which country?

(a)China           (b) India             (c) Russia           (d)   USA

Answer: (d)

80. It is difficult to work on ice because of:

(a)Absense of friction             
(b) More friction

(c) Less inertia                   
(d) Abesense of inertia

Answer: (a)

81. Special Theory of Relativity was proposed in:

(a)1900      (b) 1902     (c) 1903       (d)  1905

Answer: (d)

82. Kaleidoscope is based on the principle of:

(a)Reflection                                     (b) Multiple Reflection

(c) Total internal reflection          (d)  Refraction

Answer: (b)

83. The most common use of silicon hydrogels in making which among the following?

(a)Surgery equipment                     (b) Breast transplants

(c) Contact lenses                            (d) Capsules of medicines

Answer: (c)

84. ‘Centrino’ is related to:

(a) Photography                         (b) Mobile technology

(c) Bio technology                      (d)  Missile technology

Answer: (b)

85. Which physical property does not change with quality?

(a)Volume         (b) Weight         (c) Mass                 (d) Density

Answer: (d)

86. The energy that travels through telephone line:

(a)Radio energy                    (b) Mechanical energy

(c) Electrical energy              (d) Sound energy

Answer: (c)

87. The focal length of a concav lens:

(a)Negative                                                        (b) Positive

(c) Either negative or positive                       (d) None of these

Answer: (a)

88. The process by means of which we can smell the fish being fried in a neighbour’s home is called:

(a)Diffusion          (b) Effusion        (c) Intrusion           (d) Distribution

Answer: (a)

89. Vulcanisation of rubber is done to make it:

(a)Shining         (b) Softer        (c) Rigid                  (d) Durable

Answer: (d)

90. Which of the following is a physical change?

(a)Formation of curd from milk                 (b) Breaking of a glass bottle

(c)Corrosion of photo frame                         (d) Ripening of grapes

Answer: (b)

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