NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1982  1986 of 2142
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Question number: 1982
» Gravitation » Gravitational Acceleration
Question
What will be the acceleration due to gravity on the surface of the moon if its radius is the radius of the earth and its mass is the mass of the earth?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1983
» Rotational Motion » Radius of Gyration
Question
The radius of gyration of a disc of mass 80 g and radius 3 cm, about an axis passing through its center of gravity and perpendicular to the plane is
Choices
Choice (4)  Response  

a.  6.54 cm 

b.  1.76 cm 

c.  2.12 cm 

d.  3.54 cm 

Question number: 1984
» Rotational Motion » Moment of Inertia
Question
From a uniform wire, two circular loops are made loopP of radius r and loopQ of radius nr. Materials of both the loops are same. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 8 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.  6 

b.  4 

c.  8 

d.  2 

Question number: 1985
» Gravitation » Gravitational Acceleration
Question
At what height above the earth’s surface does the force of gravity decrease by 10%? Assume radius of earth to be 6370 km.
Choices
Choice (4)  Response  

a.  245 km 

b.  300 km 

c.  150 km 

d.  345 km 

Question number: 1986
» Rotational Motion » Moment of Inertia
Assertion (Ꭺ)
Moment of inertia of a particle is same, whatever be the axis of rotation.
Reason (Ꭱ)
Moment of inertia depends on mass and perpendicular distance of the particle from its axis of rotation.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

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

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

d.  Ꭺ is false but Ꭱ is true 
