Properties of Solids & Liquids (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 41  45 of 190
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Question number: 41
» Properties of Solids & Liquids » StressStrain Relationship
Question
A wire of length lm is stretched by a force of 15 N. The area of crosssection of the wire is 2 × 10 ^{6} m ^{2} and Y is 2 × l0 ^{6} N/m ^{2}. Increase in length of the wire will be 
Choices
Choice (4)  Response  

a.  3.75 × 10 ^{5} m 

b.  4.45 × 10 ^{5} m 

c.  2.25 × 10 ^{5} m 

d.  Question does not provide sufficient data or is vague 

Question number: 42
» Properties of Solids & Liquids » Young's Modulus
Question
For a given material, the Young’s modulus is 2.8 times that of rigidity modulus. It’s Poisson’s ratio is
Choices
Choice (4)  Response  

a.  2 

b.  0.4 

c.  1.02 

d.  0.2 

Question number: 43
» Properties of Solids & Liquids » Thermal Expansion
Question
Flask is filled up to a mark with 50 cc of mercury at 8°C. If the flask and contents are heated to 38°C, how much mercury will be above the mark? (α for glass is 9 × 10 ^{6} /°C and coefficient of real expansion of mercury is 180 × 10 ^{6})
Choices
Choice (4)  Response  

a.  0.05 

b.  0.85 cc 

c.  0.46 cc 

d.  0.153 cc 

Question number: 44
» Properties of Solids & Liquids » Latent Heat
Question
A lead bullet at 27° C just n tits when, stopped by an obstacle. Assuming that 25 % of heat is absorbed by the obstacle, then the velocity of the bullet at the time of striking (M. P. of lead = 327°C, specific heat of lead = 0.03 cal/gm °C, latent heat of fusion of lead = 6 cal/gm and J = 4.2 joule/cal)
Choices
Choice (4)  Response  

a.  307.5 m/sec 

b.  1230 m/sec 

c.  410 m/sec 

d.  Question does not provide sufficient data or is vague 

Question number: 45
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Question
Which of the following statements are true in case when two water. drops coalesce and make a bigger drop?
(1) Energy is released.
(2) Energy is absorbed.
(3) The surface area of the bigger drop is smaller than the sum of the surface areas of both the drops.
(4) The surface area of the bigger drop is greater than the sum of the surface areas of both the drops.
select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1, 2 and 3 are correct 

b.  1 and 2 are correct 

c.  1 and 3 are correct 

d.  2 and 4 are correct 
