Uniform Circular Motion in Hindi. We covered all the Uniform Circular Motion in Hindi in this post for free so that you can practice well for the exam.
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Mock Test on Uniform Circular Motion for Students
UCM is an example of motion in which :
(A) Speed is constant with zero acceleration
(B) Velocity is constant with zero acceleration
(C) Speed is constant with constant acceleration
(D) Speed is variable with constant acceleration
Option c - Speed is constant with constant acceleration
The torque due to centripetal force about the axis of rotation to maintain UCM :
(A) zero
(B) f.r
(C) r x f
(D) finite
Option a - zero
Assume that the earth goes around the sun in a circular orbit with a constant speed of 30 km/s
(A) Average velocity of the earth from 1 Jan to 30 June is Zero.
(B) The average acceleration from 1 Jan to 30 June is 60 km/s²
(C) The average speed of the earth from 30 June to 31 Dec is Zero.
(D) The instantaneous acceleration of the earth points towards the sun.
Option d - The instantaneous acceleration of the earth points towards the sun
An airplane is moving on a circular path with a uniform speed of 300 km/hr. The change in velocity after half the revolution is :
(A) Zero
(B) 150 km/hr
(C) 600 km/hr
(D) 900 km/hr
Option c - 600 km/hr
A sphere of mass 100 g is attached to a string of length 1.3 m whose upper end is fixed to the ceiling. The sphere is made to describe a horizontal circle of radius 50 cm. The time period of the revolution is :
(A) 5.05 s
(B) 4.55 s
(C) 3.25 s
(D) 2.19 s
Option d - 2.19 s
A stone is rotated steadily in a horizontal circle with a period T by a string of length 1. If the tension in the string is kept constant and I is increased by 1%. What is the percentage change in the time period? :
(A) 1%
(B) 0.5 %
(C) 2%
(D) 0.25 %
Option b - 0.5 %
In uniform circular motion :
(A) Both velocity and acceleration are constant
(B) Acceleration and speed are constant but velocity changes
(C) Both acceleration and velocity change
(D) Both decreases and speed is constant
Option c - Both acceleration and velocity change
Which of the following does not remains constant in UCM?
(A) Speed
(B) Kinetic energy
(C) Angular momentum
(D) Velocity
Option d - Velocity
A particle tied to one end of a string is being revolved in UCM in a horizontal plane. The tension in the string is :
(A) Same at all points
(B) Varying from point to point
(C) Maximum at one point and minimum at diametrically opposite points
(D) Maximum at points normal to each other
Option a - Same at all points
A can filled with water is revolved in a vertical circle of radius 4 m and water just do not fall down at the highest point. The time period of revolution is : (g = 9.8 m/s²)
(A) 1 s
(B) 2 s
(C) 4 s
(D) 8 s
Option c - 4 s
We covered all the uniform circular motion in Hindi above in this post for free so that you can practice well for the exam.
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