Rotational MotionMoment of Inertia (NEET Physics): Questions 16  18 of 34
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
Question number: 16
» Rotational Motion » Moment of Inertia
Question
The moment of inertia of a thin square plate ABCD of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is
(1)
(2)
(3)
(4)
where I _{1}, I _{2, } I _{3} are respectively moments of inertia about axes 1, 2, 3 and 4 which are in the plane of the plate.
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1, 2 and 3 are correct 

b.  1 and 3 are correct 

c.  1 and 2 are correct 

d.  2 and 4 are correct 

Question number: 17
» Rotational Motion » Moment of Inertia
Assertion (Ꭺ)
If earth shrink (without change in mass) to half of its present size, length of the day would become 6 % increase.
Reason (Ꭱ)
When the size of the earth will change, its moment of inertia will also change.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

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

c.  Ꭺ is true but Ꭱ is false 

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

Question number: 18
» Rotational Motion » Moment of Inertia
Question
Two discs of the same material and thickness have radii 0.4 m and 0.8 m. Their moments of inertia about their axes will be in the ratio of
Choices
Choice (4)  Response  

a.  1: 81 

b.  1: 27 

c.  1: 16 

d.  1: 3 
