NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1198  1202 of 2184
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Question number: 1198
» 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.  4.45 × 10 ^{5} m 

b.  3.75 × 10 ^{5} m 

c.  2.25 × 10 ^{5} m 

d.  Question does not provide sufficient data or is vague 

Question number: 1199
» Wave Optics » Brewster's Law
Question
A light has amplitude A and angle between analyser and polariser is 60°. Light transmitted by analyser has amplitude
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1200
» Wave Optics » Young's Double Slit Experiment
Question
The width of one of the two slits in a Young’s double slit experiment is double of the other slit. Assuming that the amplitude of the light is coming from a slit is proportional to slitwidth. Find the ratio of the maximum to the minimum intensity in the interference pattern.
Choices
Choice (4)  Response  

a.  34: 1 

b.  9: 1 

c.  16: 1 

d.  4: 1 

Question number: 1201
» 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.  1.02 

b.  2 

c.  0.4 

d.  0.2 

Question number: 1202
» 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.  0.153 cc 

b.  0.05 

c.  0.85 cc 

d.  0.46 cc 
