NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1230  1234 of 2142
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Question number: 1230
» Properties of Solids & Liquids » Thermal Expansion
Question
The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1231
» Properties of Solids & Liquids » Thermal Expansion
Question
An iron tire is to be fitted on to a wooden wheel 1 m in diameter. The diameter of tire is 6mm smaller than that of wheel. The tire should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is 3.6 × 10 ^{5} /°C)
Choices
Choice (4)  Response  

a.  500°C 

b.  167°C 

c.  334°C 

d.  1000°C 

Question number: 1232
» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum
Question
Light of wavelength 6328 Å is incident normally on slit having a width of 0.2 mm. The width of the central maximum measured from minimum to minimum of diffraction pattern on a screen 9.0 meters away will be about –
Choices
Choice (4)  Response  

a.  0.36° 

b.  0.09° 

c.  0.18° 

d.  0.72° 

Question number: 1233
» Properties of Solids & Liquids » Modulus of Rigidity
Question
The compressibility of water is 5 × 10 ^{10} m ^{2} /N. If it is subjected to a pressure of 15 MPa the fractional decrease in volume will be 
Choices
Choice (4)  Response  

a.  7.5 ×10 ^{3} 

b.  1.5 × 10 ^{2} 

c.  5.6 × 10 ^{4} 

d.  3.3 × 10 ^{5} 

Question number: 1234
» Properties of Solids & Liquids » Hooke's Law
Question
A wire of length lm and area of cross section 4 × 10 ^{8} m ^{2 } increases in length by 0.2 cm when a force of 16 N is applied. Value of Y for the material of the wire will be
Choices
Choice (4)  Response  

a.  2 × l0 ^{11} N/mm ^{2} 

b.  2 × 10 ^{11} kg/m ^{2} 

c.  2 × l0 ^{6 } N/m ^{2} 

d.  2 × 10 ^{11 } N/m ^{2} 
