Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 179  182 of 190
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Question number: 179
» Properties of Solids & Liquids » Heat Transfer » Conduction
Assertion (Ꭺ)
The equivalent thermal conductivity of two plates of same thickness in contact (series) is less than the smaller value of thermal conductivity.
Reason (Ꭱ)
For two plates of equal thickness in contact (series) the equivalent thermal conductivity is given by
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

b.  Ꭺ is true but Ꭱ is false 

c.  Both Ꭺ and Ꭱ are false 

d.  Ꭺ is false but Ꭱ is true 

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Question number: 180
» Properties of Solids & Liquids » Elastic Behavior
Question
The volume of a solid rubber ball when it is carried from the surface to the bottom of a 200 m deep lake decreases by 0.1 %. The value for bulk modulus of elasticity for rubber will be
Choices
Choice (4)  Response  

a.  2 × l0 ^{6 } Pa 

b.  2 × 10 ^{4} Pa 

c.  2 × l0 ^{4 } Pa 

d.  2 × l0 ^{9 } Pa 

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Question number: 181
» Properties of Solids & Liquids » Specific Heat Capacity
Question
A student takes 50 gm wax (specific heat = 0.6 kcal/kg °C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively.
Choices
Choice (4)  Response  

a.  500 cal, 50°C 

b.  1000 cal, 100°C 

c.  1500 cal, 200°C 

d.  1000 cal, 200°C 

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Question number: 182
» Properties of Solids & Liquids » Terminal Velocity
Question
A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius if at a depth 4y from the top. When the tank is completely filled with water the quantities of water flowing out per second from both the holes are the same. Then R is equal to
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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