Angular Momentum in Hindi. We covered all the Angular Momentum in Hindi in this post for free so that you can practice well for the exam.
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Mock Test on Angular Momentum for Students
A wheel of the moment of inertia 5 kg m² rotates at the rate of 600 rpm: it is coupled with another wheel of the moment of inertia 10 kg m² which is initially at rest. Find the number of revolutions per minute of the coupled system :
(A) 100 rpm
(B) 200 rpm
(C) 300 rpm
(D) 400 rpm
Option b - 200 rpm
If the angular velocity of a body is doubled then the ratio of its angular momentum is :
(A) 1 : 2
(B) 1 : 4
(C) 1 : 8
(D) 2 : 1
Option a - 1 : 2
A pan containing a layer of uniform thickness of ice is placed on a circular turntable with its center coinciding with the center of the turntable. The turntable is now rotated at a constant angular velocity about a vertical axis passing through its center and driving torque is withdrawn. There is no friction between the table and the pivot. As the ice melts :
(A) The angular velocity decreases
(B) The angular velocity increases
(C) The angular velocity remains unchanged
(D) The moment of inertia remains unchanged
Option a - The angular velocity decreases
A mass is rotating in a plane about a fixed point. Its angular momentum is directed along
(A) The radius
(B) The tangent in the orbit
(C) A line perpendicular to the plane of rotation
(D) A line parallel to the plane of rotation
Option c - A line perpendicular to the plane of rotation
A boy comes running and sits on a merry-go-round. What is conserved?
(A) Linear momentum
(B) Kinetic energy
(C) Angular momentum
(D) Velocity
Option c - Angular momentum
A swimmer while jumping into the water from a height, easily forms a loop in the air so as to :
(A) Decrease M.I. and increase angular speed
(B) Decrease M.I. and decrease angular speed
(C) Increase M.I. and increase angular speed
(D) Increase M. I and decrease angular speed
Option a - Decrease M.I. and increase angular speed
Angular momentum is :
(A) a Polar vector
(B) An axial vector
(C) A scalar
(D) A Tensor
Option b - An axial vector
In the absence of external torque on a system, which of the following will not change?
(A) Linear momentum
(B) Angular momentum
(C) Both linear momentum and angular momentum
(D) Force
Option b - Angular momentum
The moment of momentum is called :
(A) Couple
(B) Torques
(C) Impulse
(D) Angular momentum
Option d - Angular momentum
The direction of angular momentum of the rotating body in the vertical plane is :
(A) Vertical
(B) Horizontal
(C) Tangential
(D) Radial
Option b - Horizontal
When the mass is rotating in a plane about a fixed point. Its angular momentum is directed along
(A) The radius
(B) The tangent to orbit
(C) the Line at an angle of 45° to the plane of rotation
(D) The axis of rotation
Option d - The axis of rotation
If a student, sitting on a rotating table, with his arms outstretched, suddenly lowers his hands then his :
(A) Angular velocity decreases
(B) Moment of inertia decreases
(C) Angular velocity remains constant
(D) Angular momentum increases
Option b - Moment of inertia decreases
We covered all the angular momentum in Hindi above in this post for free so that you can practice well for the exam.
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