NEET Physics: Questions 254  257 of 2099
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Question number: 254
Question
A constant torque of 700 N m, turns a wheel of moment of inertia 50 kg m ^{2} about an axis passing through the center. Angular velocity of the wheel after 2 s will be
Choices
Choice (4)  Response  

a.  1 rad/s  
b.  15 rad/s  
c.  28 rad/s  
d.  5 rad/s 
Question number: 255
» Electrostatics » Electrostatic Potential Energy
Question
Charges q, Q and q are placed at equal distance on a straight line. If the total potential energy of the system of three charges is zero, then find the ratio Q/q.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 256
» Electrostatics » Electric Field Due to a Point Charge
Question
Two point charges Q and 3 Q are placed at some distance apart. If the electric field at the location of Q is E then, what will be at the locality of 3Q?
Choices
Choice (4)  Response  

a. 
 
b.  E  
c. 
 
d.  3E 
Question number: 257
» Rotational Motion » Angular Momentum
Question
Two discs of moment of inertia 1 _{1} and I _{2} and angular speeds _{1} and _{2} are rotating along collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combined along the same axis the rotational KE of system will be
Choices
Choice (4)  Response  

a. 
 
b. 
 
c.  v  
d.  None of the above 