Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 148  152 of 190
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Question number: 148
» Properties of Solids & Liquids » Young's Modulus
Question
A stress of 2 kg/mm ^{2} is applied on a wire. If the modulus of elasticity of the wire is 10 ^{10} dyne/cm ^{2}, then the percentage increase in the length of the wire will be
Choices
Choice (4)  Response  

a.  0.0098 

b.  0.007 

c.  0.0028 

d.  0.0196 

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Question number: 149
» Properties of Solids & Liquids » Elastic Behavior
Assertion (Ꭺ)
The bridges declared unsafe after a long use.
Reason (Ꭱ)
Elastic strength of bridges losses with time.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

d.  Ꭺ is true but Ꭱ is false 

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Question number: 150
» Properties of Solids & Liquids » Thermal Expansion
Question
The temperature of equal masses of three different liquids A, B and C are 12°C, 19 ^{0} C and 28°C respectively. The temperature when A and B are mixed is 16°C and who and C are mixed is 23 ^{0} C. The temperature when A and C are mixed is
Choices
Choice (4)  Response  

a.  25.2°C 

b.  22°C 

c.  20.2°C 

d.  18.2°C 

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Question number: 151
» Properties of Solids & Liquids » Young's Modulus
Question
A steel wire is 4.0 m long and 2 mm in diameter. Young’s modulus of steel is 1.96 x 10 ^{11} N/m ^{2}. If a mass of 20 kg is suspended from it the elongation produced will be 
Choices
Choice (4)  Response  

a.  0.64 mm 

b.  127 mm 

c.  2.54 mm 

d.  0.27 mm 

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Question number: 152
» Properties of Solids & Liquids » Specific Heat Capacity
Question
A beaker contains 200 gm of water. The heat capacity the beaker is equal to that of 20 gm of water. The initial temperature of water in the beaker is 20°C. If 440 gm hot water at 92°C is poured in it, the final temperature (neglecting radiation loss) will be nearest to
Choices
Choice (4)  Response  

a.  68°C 

b.  73°C 

c.  58°C 

d.  78°C 

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