NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 377  380 of 2320
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Question number: 377
» Laws of Motion » Force and Inertia
Question
The roadway bridge over a canal is the form of an arc of a circle of radius 10 m. What is the minimum speed with which a car can cross the bridge without leaving contact with the ground at the highest point (g = 9.8 m/s ^{2})
Choices
Choice (4)  Response  

a.  5.76 m/s  
b.  9.899 m/s  
c.  7.556 m/s  
d.  14.654 m/s 
Question number: 378
» Electrostatics » Electrostatic Potential Energy
Question
An electric dipole has the magnitude of its charge is q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is perpendicular to the direction of the field, the force on it and its potential energy are respectively
Choices
Choice (4)  Response  

a.  q. E and  
b.  q. E and  
c.  are zero  
d.  2q. E and minimum 
Question number: 379
» Rotational Motion » Angular Momentum
Question
Two rigid bodies A and B rotate with rotational kinetic energies E _{A} and E _{B} respectively. The moments of inertia of A and B about the axis of rotation are I _{A} and I _{B} respectively. If I _{A} = I _{B} /8 and E _{A} = 50 E _{B}, the ratio of angular momentum (L _{A}) of A to the angular momentum (L _{B}) of B is
Choices
Choice (4)  Response  

a.  0. . 25  
b.  2.5  
c.  5  
d.  1.25 
Question number: 380
» Electrostatics » Electrostatic Potential Energy
Question
If identical charges (q) are placed at each corner of a cube of side b , then electric potential energy of charge (+q) which is placed at center of the cube will be
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
