NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1940 - 1944 of 2142
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Question number: 1940
» Rotational Motion » Values of Moments of Inertia
Question
A flywheel rotating about a fixed axis has a kinetic energy of 380 J, when its angular speed is 35 rad s -1. The moment of inertia of the wheel about the axis of rotation is,
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 0.8 kg m 2 |
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| b. | 0.75 kg m 2 |
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| c. | 0.15 kg m 2 |
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| d. | 0.62 kg m 2 |
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Question number: 1941
» Rotational Motion » Values of Moments of Inertia
Question
A cylinder of 500 g and radius 10 cm has moment of inertia (about its natural axis)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2.5 ⨯ 10 -3 kg-m 2 |
|
| b. | 2 ⨯ 10 -3 kg-m 2 |
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| c. | 3.5 ⨯ 10 -3 kg-m 2 |
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| d. | 5 ⨯ 10 -3 kg-m 2 |
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Question number: 1942
» Rotational Motion » Values of Moments of Inertia
Question
Three particles of mass 1.5 kg are attached to the rim of a circular disc of radius 0.2 m & negligible mass. Moment of inertia of die system about an axis passing through the center of the disc & perpendicular to its plane is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 2.2 kg-m 2 |
|
| b. | 0.18 kg-m 2 |
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| c. | l kg-m 2 |
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| d. | 0.24 kg-m 2 |
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Question number: 1943
» Gravitation » Gravitational Acceleration
Question
On a planet (whose size is the same as that of earth and mass 4 times to the earth) the energy needed to lift a 2 kg mass vertically upwards through 2 m distance on the planet is (g = l0 m/sec 2 on the surface of earth) –
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 160 J |
|
| b. | 320 J |
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| c. | 16 J |
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| d. | 32 J |
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Question number: 1944
» Gravitation » Gravitational Acceleration
Assertion (Ꭺ)
The universal gravitational constant is same as acceleration due to gravity.
Reason (Ꭱ)
Gravitational constant and acceleration due to gravity have different dimensional formula.
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 true but Ꭱ is 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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