General Science Physics -7

91. A diode converts:

(a)DC into AC      
(b) AC into DC     
(c) Both AC and DC       
(d) None of these

Answer: (b)

92. A cotton wick dipped in pure honey when ignited with a match stick will:

(a)Burn consistantly                             
(b) Burn with cracking sound

(c) Does not burn at all                        
(d) Burn with too much smoke

Answer: (a)

93. An example of a substance which is neither a good conductor of electricity nor an insulator is:

(a) Uranium             
(b) Magnisium            
(c) Sodium              
(d) Germanium

Answer: (d)

94. Which type of heat treatment helps steel to bend?

 (a) Annealing         
(b) Tempering              
(c) Hardening          
(d) None of these

Answer: (a)

95. The Universal Product Code (UPC) is a standard symbology for which of the following?

(a)Fire safety code                          
(b) Bar code

(c) Building safety code                   
(d) None of these

Answer: (b)

96. Newton’s first law gives the defenition for:

(a)Force          
(b) Velocity             
(c) Mass             
(d) Inertia

Answer: (d)

97. The type of glass which can cut off ultra violet rays:

(a)Flint glass             
(b) Crookes glass

(c) Pyrex glass           
(d) Safety glass

Answer: (b)

98. The energy absorbed during the change of a state of substance is called:

(a)Specific heat                                 
(b) Latent heat

(c) Coefficient of expansion             
(d) Refractive index

Answer: (b)

99. The mirror used in search light is:

(a)Convex          
(b) Concave          
(c) Spherical        
(d) Parabolic

Answer: (d)

100. What is measured by spring balance?

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

Answer: (a)

(Continue....)

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