Rotational Motion-Moment of Inertia (NEET 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, Equation 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 Equation 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,

A small portion of radius R/3 is removed from thedisc ofradiusR

A Small Portion of Radius R/3 Is Removed From Thedisc ofradiusR

Figure shows that circular disc of radius R and mass 9 M, a small disc of radius R/3 is removed from the disc.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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