NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1974  1978 of 2142
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Question number: 1974
» Gravitation » Gravitational Acceleration
Assertion (Ꭺ)
There is no effect of rotation of earth on the value of acceleration due to gravity at poles.
Reason (Ꭱ)
Rotation of earth is about polar axis.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

b.  Ꭺ is false but Ꭱ is true 

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

d.  Ꭺ is true but Ꭱ is false 

Question number: 1975
» 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.  128 km 

b.  128000 km 

c.  1280 km 

d.  12800 km 

Question number: 1976
» Rotational Motion » Moment of Inertia
Question
Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY’ will be,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1977
» Rotational Motion » Values of Moments of Inertia
Question
Five particles of mass 2 kg are attached to the rim of a circular disc of radius 0.1 m & negligible mass. Moment of inertia of this system about an axis passing through the center of the disc & perpendicular to its plane is,
Choices
Choice (4)  Response  

a.  0.1 kgm ^{2} 

b.  l kgm ^{2} 

c.  2 kgm ^{2} 

d.  0.2 kgm ^{2 } 

Question number: 1978
» Gravitation » Universal Law of Gravitation
Question
The gravitational force between two point masses m _{1} and m _{2} at separation r is given by
The constant k doesn’t
(1) Depend on medium between masses
(2) Depend on the place
(3) Depend on time
(4) Depend on system of units
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1 and 2 are correct 

b.  1,2 and 3 are correct 

c.  2 and 4 are correct 

d.  1 and 3 are correct 
