# Rotational Motion-Moment of Inertia (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 26 - 29 of 34

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## Question number: 26

» 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 125 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.

2

b.

5

c.

6

d.

3

## Question number: 27

» Rotational Motion » Moment of Inertia

Assertion-Reason▾

### Assertion (Ꭺ)

If two different axes are at same distance from the centre of mass of a rigid body, then moment of inertia of the given rigid body about both the axes will always be the same.

### Reason (Ꭱ)

From parallel axis theorem, where all terms have usual meaning.

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

## Question number: 28

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

The moment of inertia of a circular ring about an axis passing through its center and normal to its plane is 200 gm ⨯ cm 2. Then moment of inertia about its diameter is,

### Choices

Choice (4) Response

a.

400 gm ⨯ cm 2

b.

100 gm ⨯ cm 2

c.

200 gm ⨯ cm 2

d.

300 gm ⨯ cm 2

## Question number: 29

» Rotational Motion » Moment of Inertia

MCQ▾

### Question

From a circular disc of radius R and mass 9 M, a small disc of radius is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through O is,

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page