Rotational Motion-Moment of Inertia [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 23 - 27 of 79

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Question 23

Question MCQ▾

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.

2: 1

b.

1: 1

c.

4: 1

d.

1: 2

Edit

Question 24

Question MCQ▾

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.

b.

c.

d.

Edit

Question 25

Question MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 26

Question MCQ▾

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.

3

b.

5

c.

6

d.

2

Edit

Question 27

Question 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 false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Edit