NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1217 - 1221 of 2142
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Question number: 1217
» Properties of Solids & Liquids » Elastic Behavior
Question
The force required to separate two glass plates of area 3 ×10 -2 m -2 with a film of water 0.03 m thick between them, is (Surface tension of water is 70 × 10 -3 N/m)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 280 N |
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| b. | 130 N |
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| c. | 140 N |
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| d. | 380 AT |
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Question number: 1218
» Properties of Solids & Liquids » Young's Modulus
Question
Which statements are false for a metal?
(a)
(b)
(c)
(d)
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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Question number: 1219
» Properties of Solids & Liquids » Terminal Velocity
Question
Water is filled in a cylindrical container to a height of 3 m. The ratio of the cross-sectional area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is (g = 10m/s 2)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 50 m 2 /s 2 |
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| b. | 52 m 2 /s |
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| c. | 50.5 m 2 /s 2 |
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| d. | 51 m 2 /s 2 |
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Question number: 1220
» Properties of Solids & Liquids » Elastic Behavior
Question
A uniform steel wire of density 7800 kg/m 3 is 2.5 m long and weighs 15.6 × 10 -3 kg. It extends by 1.25 mm when loaded by 8 kg. Calculate the value of young’s modulus of elasticity for steel.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 19.6 × 10 11 N/m 2 |
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| b. | 1.96 × 10 11 N/m 2 |
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| c. | 196 × 10 11 N/m 2 |
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| d. | All of the above |
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Question number: 1221
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Question
A homogeneous solid cylinder of length L and cross-sectional area is immersed such that it floats with its axis vertical at the liquid-liquid interface with length in the denser liquid as shown in the fig. The lower density liquid is open to atmosphere having pressure P Q. Then density of solid is given by
Homogeneous Solid Cylinder in Liquid
Here in above fig we show that homogenous cylinder of length in liquid, phase interface with length L4.
Choices
| Choice (4) | Response | |
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| a. |
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| b. |
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| c. |
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| d. |
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