NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1433 - 1437 of 2142
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Question number: 1433
» Wave Optics » Wavefront
Question
When the light source is moving towards the observer,
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | The wavelength of light remains same |
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| b. | The wavelength of light decreases |
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| c. | The velocity of light increases |
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| d. | The wavelength of light increases |
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Question number: 1434
» Properties of Solids & Liquids » Heat Transfer » Conduction
Question
A 10 cm thick ice block is there on the surface of water in a lake. The temperature of air is - 10° C; how much time it will take to double the thickness of the block (L = 80 cal/g, K ice = 0.004 erg/s-k, ρ ice = 0.92 gm cm -3)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 51.11 hours |
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| b. | 21 hour |
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| c. | 19.11 hours |
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| d. | 191 hours |
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Question number: 1435
» Atoms and Nuclei » Bohr Model
Assertion (Ꭺ)
Bohr postulated that the electrons in stationary orbits around the nucleus do not radiate energy.
Reason (Ꭱ)
According to classical physics all moving electrons radiate energy.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ |
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| b. | Ꭺ is false but Ꭱ is true |
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| c. | Ꭺ is true but Ꭱ is false |
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| d. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
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Question number: 1436
» Wave Optics » Huygens' Principle
Question
Two waves originating from source S 1 and S 2 having zero phase difference and common wavelength X will show completely destructive interference at a point P if (S 1 P - S 2 P) is-
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. | 2 λ |
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Question number: 1437
» Properties of Solids & Liquids » Specific Heat Capacity
Question
Heat is supplied to a certain homogenous sample of matter, at a uniform rate. Its temperature is plotted against time, as shown. Which of the following conclusions can be drawn?
Temperature vs Time Graph - Homogenous Sample of Matter
In above fig we show that the graph of temp vs time which describe effect of heat on certain homogenous matter.
(1) Its specific heat capacity is greater in the liquid state than in the solid state
(2) Its latent heat of vaporization is greater than its latent heat of fusion
(3) Its specific heat capacity is greater in the solid state than in the liquid state
(4) Its latent heat of vaporization is smaller than its latent heat or fusion
Select the correct answers and mark it according to the following codes:
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 1, 2 and 3 are correct |
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| b. | 1 and 2 are correct |
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| c. | 2 and 4 are correct |
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| d. | 1 and 3 are correct |
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