# Rotational Motion-Moment of Inertia (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 8 - 11 of 34

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## Question number: 8

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 27 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

### Choices

Choice (4) Response

a.

4

b.

6

c.

2

d.

3

## Question number: 9

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY’ will be,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 10

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

Moment of inertia depends on,

(1) Distribution of particles

(2) Mass

(3) Radius of gyration

(4) Medium

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

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

## Question number: 11

» Rotational Motion » Moment of Inertia

Assertion-Reason▾

### Assertion (Ꭺ)

Radius of gyration of a body is a constant quantity.

### Reason (Ꭱ)

The radius of gyration of a body about an axis of rotation may be defined as the root mean square distance of the particles of the body from the axis of rotation.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Both Ꭺ and Ꭱ are false

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