NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1355  1358 of 2184
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Question number: 1355
Question
V _{0} and V _{E} represent the velocities, µ _{0} and μ _{E} the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then
Choices
Choice (4)  Response  

a.  if the crystal is calcite 

b.  if the crystal is quartz 

c.  if the crystal is quartz 

d.  if the crystal is calcite 

Question number: 1356
» Properties of Solids & Liquids » Elastic Behavior
Question
A uniform steel wire of density 7500 kg/m ^{3} is 2.5 m long and weighs 15.6 x 10 ^{3} kg. It extends by 1.25 mm when loaded by 10 kg. Calculate the value of young’s modulus of elasticity for steel.
Choices
Choice (4)  Response  

a.  2.3 × 10 ^{11} N/m ^{2} 

b.  19.6 × 10 ^{11} N/m ^{2} 

c.  2.96 × 10 ^{11} N/m ^{2} 

d.  Question does not provide sufficient data or is vague 

Question number: 1357
» Wave Optics » Wavefront
Question
In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on θ for constructive interference at P between the ray BP and reflected ray OP
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1358
» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics
Question
One mole of an ideal gas expands at a constant temperature of 300 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is
(R = 8.31J/moleK)
Choices
Choice (4)  Response  

a.  1728 Joules 

b.  750 Joules 

c.  1500 Joules 

d.  3456 Joules 
