NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1949  1953 of 2142
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Question number: 1949
» Gravitation » Gravitational Acceleration
Question
At what height above the earth’s surface the acceleration due to gravity will be of its value at the earth’s surface? Radius of earth is 6400 km
Choices
Choice (4)  Response  

a.  25600 km 

b.  2228 km 

c.  12800 km 

d.  2560 km 

Question number: 1950
» Rotational Motion » Radius of Gyration
Question
The moment of inertia of a sphere of mass M and radius R _{2 } about an axis passing through its center is MR. The radius of gyration of the sphere about a parallel axis to the above and tangent to the sphere is,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1951
» Rotational Motion » Values of Moments of Inertia
Question
A cylinder of 800 g and radius 30 cm has moment of inertia (about its natural axis)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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. 

