NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1408 - 1412 of 2142
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Question number: 1408
» Properties of Solids & Liquids » Specific Heat Capacity
Question
A beaker contains 400 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 240 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. | 12.58°C |
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| b. | 46.18°C |
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| c. | 6.348°C |
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| d. | 73.4°C |
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Question number: 1409
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Question
Radius of a capillary tube is 4 × 10 -3 m. A liquid of weight 5.20 × 10 -4 N may remain in the capillary tube then the surface tension of liquid will be
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2.3 × 10 -2 N/m |
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| b. | 20 N/m |
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| c. | 2.0 × 10 -2 N/m |
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| d. | 20 × 10 -3 N/m |
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Question number: 1410
» Properties of Solids & Liquids » Heat Transfer » Convection
Question
When fluids are heated from the bottom, convection currents are produced because
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Heated fluid becomes less dense than the cold fluid above it |
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| b. | Molecular motion of fluid becomes aligned |
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| c. | Heated fluid becomes more dense than the cold fluid above it |
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| d. | Molecular collisions take place within the fluid |
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Question number: 1411
» Properties of Solids & Liquids » Young's Modulus
Question
For a given material, the Young’s modulus is 2.4 times that of rigidity modulus. Its Poisson’s ratio is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2 |
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| b. | 0.2 |
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| c. | 1.02 |
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| d. | 1.2 |
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Question number: 1412
» Wave Optics » Huygens' Principle
Assertion (Ꭺ)
No interference pattern is detected when two coherent sources are infinitely close to each other.
Reason (Ꭱ)
The fringe width is directly proportional to the distance between the two slits.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Ꭺ is true but Ꭱ is false |
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| b. | Both Ꭺ and Ꭱ are false |
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| c. | Ꭺ is false but Ꭱ is true |
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| d. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ |
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