Rotational Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 68 - 70 of 125

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Question number: 68

» Rotational Motion » Moment of Inertia

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 69

» Rotational Motion » Moment of Inertia

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

(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.

1,2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 70

» Rotational Motion » Values of Moments of Inertia

MCQ▾

Question

A constant torque of 62.8 N-m is exerted on a pivoted wheel. If angular acceleration of wheel is rad/sec 2, then the moment of inertia of the wheel is

Choices

Choice (4) Response

a.

3 kg-m 2

b.

3.5 kg-m 2

c.

4 kg-m 2

d.

4.5 kg-m 2