# Rotational Motion-Moment of Inertia (NEET (NTA-National Eligibility cum Medical Entrance Test) Physics): Questions 15 - 17 of 34

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## Question number: 15

» 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: 16

» 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: 17

» Rotational Motion » Moment of Inertia

Assertion-Reason▾

### Assertion (Ꭺ)

If earth shrink (without change in mass) to half of its present size, length of the day would become 6 % increase.

### Reason (Ꭱ)

When the size of the earth will change, its moment of inertia will also change.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

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

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