NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1952  1955 of 2142
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Question number: 1952
» Rotational Motion » Moment of Inertia
Question
The density of a rod AB increases linearly from A to B. Its midpoint is O and its centre of mass is at C. Four axes pass through A, B, O and C all perpendicular to the length of the rod. The moments of inertia of the rod about this axis are I _{A}, I _{B}, I _{O} and I _{C} respectively then:
(1) (2)
(3) (4)
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1 and 2 are correct 

c.  1, 2 and 3 are correct 

d.  1 and 3 are correct 

Question number: 1953
» Gravitation » Universal Law of Gravitation
Question
Three particles of equal mass m are situated at the vertices of an equilateral triangle of side l. What should be the velocity of each particle, so that they move on a circular path without changing l?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1954
» Rotational Motion » Moment of Inertia
Question
Three point masses m _{1}, m _{2}, m _{3} are located at the vertices of an equilateral triangle of length ‘a’. The moment of inertia of the system about an axis along the altitude of the triangle passing through m _{1, } is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1955
» Rotational Motion » Moment of Inertia
Question
Two discs of same thickness but of different radii are made of two different materials such that their masses are same. The densities of the materials are in the ratio 1: 3. The ratio of the moments of inertia of these discs about the respective axes passing through their centers and perpendicular to their planes will be in,
Choices
Choice (4)  Response  

a.  9: 1 

b.  3: 1 

c.  1: 9 

d.  1: 3 
