NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 2025  2028 of 2142
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Question number: 2025
» Rotational Motion » Moment of Inertia
Question
From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 125 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.  2 

b.  5 

c.  6 

d.  3 

Question number: 2026
» Rotational Motion » Angular Momentum
Question
A uniform rod of length 4L is placed with one end in contact with the horizontal and is then inclined at an angle 60 ^{0} to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 2027
» Rotational Motion » Rotational Kinetic Energy
Question
Two disc, each having moment of inertia 5 kg m ^{2} about its central axis, rotating with speeds 10 rad s ^{1} and 20 rad s ^{1}, are brought in contact face with their axes of the rotation coincided. The loss of kinetic energy in the process is,
Choices
Choice (4)  Response  

a.  125 J 

b.  5 J 

c.  0 J 

d.  2 J 

Question number: 2028
Question
A flywheel of mass 25 kg has a radius of 0.3 m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 4 rad s ^{2}?
Choices
Choice (4)  Response  

a.  6.8 N 

b.  11.2 N 

c.  7.5 N 

d.  2.6 N 
