NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1942 - 1945 of 2320

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Question number: 1942

» Rotational Motion » Values of Moments of Inertia

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MCQ▾

Question

A cylinder of 500 g and radius 10 cm has moment of inertia (about its natural axis)

Choices

Choice (4)Response

a.

2 ⨯ 10 -3 kg-m 2

b.

5 ⨯ 10 -3 kg-m 2

c.

3.5 ⨯ 10 -3 kg-m 2

d.

2.5 ⨯ 10 -3 kg-m 2

Question number: 1943

» Rotational Motion » Values of Moments of Inertia

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MCQ▾

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.

0.24 kg-m 2

b.

0.18 kg-m 2

c.

l kg-m 2

d.

2.2 kg-m 2

Question number: 1944

» Gravitation » Gravitational Acceleration

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MCQ▾

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.

32 J

c.

16 J

d.

320 J

Question number: 1945

» Gravitation » Gravitational Acceleration

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Assertion-Reason▾

Question

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.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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