NEET Physics: Questions 1969  1972 of 2142
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Question number: 1969
» Rotational Motion » Values of Moments of Inertia
Question
A long rod has a mass of 0.10 kg and length of 200 cm. The moment of inertia about an axis passing through the center and perpendicular to the length of rod will be,
Choices
Choice (4)  Response  

a.  0.0033 kgm ^{2} 

b.  0.033 kgm ^{2} 

c.  0.0025 kgm ^{2} 

d.  0.025 kgm ^{2} 

Question number: 1970
» Rotational Motion » Moment of Inertia
Question
Three rods each of length L and mass M are placed along X, Y and Z axis in such a way that one end of each of the rod is at the origin. The moment of inertia of this system about Z axis is,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1971
» Gravitation » Energy
Question
With what velocity must a body be thrown upward form the surface of the earth so that it reaches a height of 7 Re? Earth’s mass M = 6 ⨯ 10 ^{24} kg, radius R _{e} = 6.4 ⨯ 10 ^{6} m and G = 6.67 ⨯ 10 ^{11} Nm ^{2} /kg ^{2}.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1972
» 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 27 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.  4 

b.  6 

c.  2 

d.  3 
