NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1989 - 1991 of 2184

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Question number: 1989

» Rotational Motion » Moment of Inertia

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MCQ▾

Question

One quarter section is cut from a uniform circular disc of radius R. This section has mass M. It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc. Its moment of inertia about the axis of rotation is

Quarter section - cut from a uniform circular disc of radius R

Quarter Section - Cut from a Uniform Circular Disc of Radius R

In figure one quarter sector is cut from a uniform circular disc of radius R and mass M

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1990

» Gravitation » Universal Law of Gravitation

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MCQ▾

Question

Spot the incorrect statements: The acceleration due to gravity ‘g’ decreases if

(1) We go down from the surface of the earth towards its center

(2) We go up from the surface of the earth

(3) The rotational velocity of the earth is increased

(4) We go from the poles towards the equators on the surface of the earth

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 2 are correct

Question number: 1991

» Rotational Motion » Moment of Inertia

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MCQ▾

Question

The moment of inertia of a thin square plate ABCD of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is

Square ABCD of uniform thickness

Square ABCD of Uniform Thickness

In above figure we shows thin square plate ABCD of uniform thickness

(1)

(2)

(3)

(4)

where I 1, I 2, I 3 are respectively moments of inertia about axes 1,2, 3 and 4 which are in the plane of the plate.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1,2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct