Properties of Solids & Liquids (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 147  150 of 190
Visit this page to view all the question topics
To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 147
» Properties of Solids & Liquids » Heat Transfer » Conduction
Question
An ice box used for keeping eatable cold has a total wall, area of 1 metre ^{2} and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 joule/meter °C. is filled with ice at 0° C along with eatables on a day when the temperature is 40°C. The latent heat of fusion of ice is 334 × 10 ^{3} joules/kg. The amount of ice melted in one day is (1 day = 86400 seconds)
Choices
Choice (4)  Response  

a.  7760 gm 

b.  1552 gm 

c.  2776 gm 

d.  2069 gm 

To view these problems with solutions proceed here and click "Subscribe Now".
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 

To view these problems with solutions proceed here and click "Subscribe Now".
Question number: 149
» Properties of Solids & Liquids » Elastic Behavior
Question
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 

To view these problems with solutions proceed here and click "Subscribe Now".
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 

To view these problems with solutions proceed here and click "Subscribe Now".