Rotational Motion-Moment of Inertia (NEET Physics): Questions 23 - 27 of 34

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Question number: 23

» Rotational Motion » Moment of Inertia

MCQ▾

Question

One circular ring and one circular disc, both are having the same mass and radius. The ratio of their moments of inertia about the axes passing through their centers and perpendicular to their planes, will be

Choices

Choice (4) Response

a.

1: 1

b.

1: 2

c.

2: 1

d.

4: 1

Question number: 24

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Moment of inertia of a disc about its own axis is I. its moment of inertia about a tangential axis in its plane is

Choices

Choice (4) Response

a.

32I

b.

2I

c.

52I

d.

3I

Question number: 25

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Four thin rods of same mass M and same length l form a square as shown in figure. Moment of inertia of this system about an axis through center O and perpendicular to its plane is,

Arrangement of four rod - mass M and same length l

Arrangement of Four Rod - Mass M and Same Length L

In above fig we shows four thin rods of same mass M and same length l, form a square

Choices

Choice (4) Response

a.

23Ml2

b.

Ml26

c.

43Ml2

d.

Ml23

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, I=Icm+md2 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

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