Rotational MotionMoment 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
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 (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
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
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. 

