KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SBSX (Class 12 & 1st Year B.Sc.) Physics: Questions 194  197 of 268
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Question number: 194
» Magnetic Effects of Current and Magnetism » Biot  Savart Law
Question
The magnetic field produced at the centre of a coil of radius R carrying a current is . The magnitude of magnetic field at a point lying on the axis of the coil at a distance from the centre of the coil is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 195
» Rotational Motion » Moment of Inertia
Question
A homogeneous sphere of mass M and radius R has moment of inertia I about its diameter. A concentric sphere of radius is carved out from the sphere. What is the moment of inertia of the remaining part about the diameter?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 196
» Laws of Motion » Equilibrium of Concurrent Forces
Appeared in Year: 2014
Question
Consider the system shown below.
A horizontal force F is applied to a block X of mass 8 kg such that the block Y of mass 2 kg adjacent to it does not slip downwards under gravity. There is no friction between the horizontal plane and the base of the block X. The coefficient of friction between the surfaces of blocks X and Y is 0.5. Take acceleration due to gravity to be 10 ms^{–2}. The minimum value of F is,
Choices
Choice (4)  Response  

a.  240N 

b.  40N 

c.  200N 

d.  160N 

Question number: 197
» Gravitation » Escape Velocity
Question
If the escape velocity from the earth is about, then the escape velocity from a planet having twice the radius and the same mean density as the earth is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

