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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 begins rotating from rest when a constant torque is applied, producing a uniform angular acceleration of 5 rad/s². What is the angular displacement covered by the flywheel during the fifth second?
a) 21.5 rad
b) 45 rad
c) 22.5 rad
d) 23.5 rad
Option b – 45 rad
A cyclist starts from the centre of a circular track with a radius of 1 km and reaches a point on the boundary. He then rides along the circumference to another point for 10 minutes. What is the cyclist’s average velocity?
a) 3 km/h
b) 6 km/h
c) 9 km/h
d) 12 km/h
Option b – 6 km/h
A particle moves on a circular path of radius 20 cm with a constant angular acceleration of 4 rad/s². If its initial angular speed is 2 rad/s, approximately how many revolutions does it complete in 5 seconds?
a) 10 rad
b) 10 revolutions
c) 50 revolutions
d) 60 revolutions
Option b – 10 revolutions
An object travels along a circular path of radius 5 cm with a constant angular acceleration of 4 rad/s². If its initial angular velocity is 4 rad/s, what will be its angular displacement after 5 seconds?
a) 3 revolutions
b) 8 revolutions
c) 11 revolutions
d) 64 revolutions
Option c – 11 revolutions
A flywheel turns through an angle of 234 radians in 3 seconds. If its angular velocity at the end of 3 seconds is 108 rad/s, what are its initial angular velocity and uniform angular acceleration?
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 initially rotating with an angular velocity of 10 rad/s continues to rotate for 5 seconds with a uniform angular acceleration of 2 rad/s². What will be its final angular velocity?
a) 12 rad/s
b) 20 rad/s
c) 8 rad/s
d) 6 rad/s
Option b – 20 rad/s
A pulley of diameter 1 metre rotates at 600 revolutions per minute and is uniformly slowed down to rest in 80 seconds due to friction at its shaft. How many revolutions does it complete before stopping?
a) 200
b) 300
c) 400
d) 500
Option c – 400
A motor wheel starts from rest and rotates with uniform angular acceleration. It covers an angular displacement of 2.5 radians in the first second. What is the angular displacement during the second 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. Through what angle does it rotate while 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
A body moves along the circumference of a circle with a linear speed equal to the speed gained by a freely falling body after falling through a distance equal to half the radius of the circle. What is the centripetal acceleration of the body?
a) g/2
b) g
c) 2g
d) 3g
Option b – g
Two particles start simultaneously from the same point on a circular track of radius 10 m and move in opposite directions with constant speeds of 2.14 m/s and 1 m/s respectively. After how much time will they collide?
a) 10 s
b) 20 s
c) 30 s
d) 40 s
Option b – 20 s
We covered all the 12th Physics 1 mark Questions with answers english medium above in this post for free so that you can practice well for the exam.
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