12th Physics 1 Mark Questions with Answers English Medium. We covered all the 12th Physics 1 Mark Questions with Answers English Medium in this post for free so that you can practice well for the exam.
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Mock Test on 12th Physics for Students
A flywheel starts rotating from rest when a torque is applied to it. With a uniform angular acceleration of 5 rad/s². The angular displacement of the flywheel in the 5th second is :
(A) 21.5 rad
(B) 45 rad
(C) 22.5 rad
(D) 23.5 rad
Option b – 45 rad
A cyclist starts from the center of the circular track of a radius of 1 km and reaches a point P on the circumference of the circle. Then he moves to Q along the circumference of the circle for a time of 10 min. The average velocity of cyclists is
(A) 3 km/hr
(B) 6 km/hr
(C) 9 km/hr
(D) 12 km/hr
Option b – 6 km/hr
A particle moves along a circular path of radius 20 cm with a constant angular acceleration of 4 rad/s². If the initial angular speed of the particle is 2 rad/s, then the number of revolutions the particle will perform in 5 seconds are near:
(A) 10 rad
(B) 10 rev
(C) 50 rev
(D) 60 rev
Option b – 10 rev
A body moves along a circular path of radius 5 cm with a constant angular acceleration of 4 rad/s². If the initial angular velocity of the body is 4 rad/s then its angular displacement at the end of 5 seconds is :
(A) 3 revolution
(B) 8 revolution
(C) 11 revolution
(D) 64 revolution
Option c – 11 revolution
A flywheel requires 3 s to rotate through 234 radians. If its angular velocity at 3 s is 108 rad/s its initial velocity and uniform acceleration will be :
(A) 48 rad/s, 24 rad/s²
(B) 108 rad/s, 54 rad/s²
(C) 48 rad/s, 20 rad/s²
(D) 108 rad/s, 20 rad/s²
Option c – 48 rad/s, 20 rad/s²
A wheel starting with an angular velocity of 10 rad/s rotates for 5 sec with a uniform angular acceleration of 2 rad/s². The final angular velocity will be in rad/sec is :
(A) 12
(B) 20
(C) 8
(D) 6
Option b – 20
A pulley one meter in diameter rotating at 600 rpm is brought to rest in 80 sec. by a constant force of friction on its shaft. How many revolutions does it make before coming to rest?
(A) 200
(B) 300
(C) 400
(D) 500
Option c – 400
The wheel of the motor, accelerated uniformly from rest, rotates through 2.5 rad during the first second, and the angle rotated during the next second.
(A) 2.5 rad
(B) 7.5 rad
(C) 10 rad
(D) 20 rad
Option b – 7.5 rad
A body rotates about a fixed axis with an angular acceleration of 1 rad/s2. The angle through which it rotates during the time in which its angular velocity increases from 5 rad/s to 15 rad/s.
(A) 5 rad
(B) 50 rad
(C) 100 rad
(D) 200 rad
Option c – 100 rad
The linear velocity of a body moving along the circumference of a circle is equal to the velocity acquired by a freely falling body in a distance equal to half the radius of the circle thus centripetal acceleration is equal to :
(A) g/2
(B) g
(C) 2 g
(D) 3 g
Option b – g
Two particles P and Q start from a point on a circle. They travel in opposite directions along a circular path of radius 10m at a constant speed of 2.14 m/s and 1 m/s respectively then they will collide after
(A) 10 seconds
(B) 20 seconds
(C) 30 seconds
(D) 40 seconds
Option b – 20 seconds
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