Properties of Solids & Liquids (NEET Physics): Questions 148  152 of 188
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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 

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 

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 

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 

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 
