Properties of Solids & Liquids (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 84 - 88 of 190
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Question number: 84
» Properties of Solids & Liquids » Thermal Expansion
Question
A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. Another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 10 cm |
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| b. | 15 cm |
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| c. | 18 cm |
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| d. | 20 cm |
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Question number: 85
» 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 20 MPa the fractional decrease in volume will be -
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 7.5 ×10 -3 |
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| b. | 5.0 × 10 -3 |
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| c. | 1.5 × 10 -2 |
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| d. | 3.3 × 10 -5 |
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Question number: 86
» Properties of Solids & Liquids » Thermal Expansion
Question
Density of a substance at 0°C is 10 gm/cc and at 100°C, its density is 9.7 gm/cc. The coefficient of linear expansion of the substance will be
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 10 2 |
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| b. | 10 -3 |
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| c. | 10 -4 |
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| d. | 10 -2 |
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Question number: 87
» Properties of Solids & Liquids » Thermal Expansion
Question
A constant volume gas thermometer shows pressure reading of 40 cm and 90 cm of mercury at 0°C and 100°C respectively. When the pressure reading is 80 cm of mercury, the temperature is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 12.5°C |
|
| b. | 40°C |
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| c. | 80°C |
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| d. | 15°C |
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Question number: 88
» Properties of Solids & Liquids » Elastic Behavior
Question
Assertion (Ꭺ)
Bulk modulus of elasticity (K) represents incompressibility of the material.
Reason (Ꭱ)
Bulk modulus of elasticity is proportional to change in pressure.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
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| b. | Ꭺ is false but Ꭱ is true |
|
| c. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ |
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| d. | Both Ꭺ and Ꭱ are false |
|