NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1164  1167 of 2142
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Question number: 1164
» Properties of Solids & Liquids » Thermal Expansion
Question
A piece of metal weight 40 gm in air, when it is immersed in the liquid of specific gravity 1.24 at 27 °C it weighs 25 gm. When the temperature of liquid is raised to 42°C the metal piece weighs 20gm, specific gravity of the liquid at 42°C is 1.20, then the linear expansion of the metal will be
Choices
Choice (4)  Response  

a.  2.6 × 10 ^{3} / ^{o} C 

b.  8.3 × 10 ^{3} /°C 

c.  3.316 × 10 ^{2} /°C 

d.  Question does not provide sufficient data or is vague 

Question number: 1165
» 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 5y 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. 


Question number: 1166
» Properties of Solids & Liquids » Thermal Expansion
Question
The real coefficient of volume expansion of glycerin is 0.000597 per °C and linear coefficient of expansion of glass is 0.000009 per °C. Then the apparent volume coefficient of expansion of glycerin is
Choices
Choice (4)  Response  

a.  0.00027 per °C 

b.  0.00057 per °C 

c.  0.000558 per °C 

d.  0.00066 per °C 

Question number: 1167
Question
Unpolarised light of intensity 32 Wm ^{2} passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is 3 Wm ^{2}, at what angle will the transmitted intensity be maximum?
Choices
Choice (4)  Response  

a.  15° 

b.  75° 

c.  35° 

d.  45° 
