Arihant DC Pandey Physics JEE. We covered all the Arihant DC Pandey Physics JEE in this post for free so that you can practice well for the exam.
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Physics JEE Mock Test for Students
A sphere has a mass of 20 kg and a radius of 0.8 m. The radius of gyration of the sphere about a tangential axis is :
(A) 0.944 m
(B) 0.8 m
(C) 0.56 m
(D) 0.4 m
Option a – 0.944 m
The radius of gyration of a disc of mass 100 grams and radius 5 cm about an axis passing through the center of gravity :
(A) 0.5 cm
(B) 2.5 cm
(C) 3.536 cm
(D) 6.54 cm
Option c – 3.536 cm
An 8 kg wheel has a radius of gyration of 1/4 m. The torque required to give it an angular acceleration of 3 rad/s²
(A) 2/3 N-m
(B) 2 N-m
(C) (3/2) N-m
(D) 3 N-m
Option c – (3/2) N-m
If a raw egg and a boiled egg are spined on the table by applying the same torque then
(A) the Boiled egg will spin faster
(B) the Raw egg will spin faster
(C) the Moment of inertia of the boiled egg will be lesser than that of the raw egg
(D) Both ‘1’ and ‘3’ are correct
Option d – Both ‘1’ and ‘3’ are correct
If the moment of inertia of a rigid body is numerically equal to its mass, the radius of gyration is
(A) Equal to its radius
(B) Equal to the diameter
(C) Equal to one unit
(D) Infinite
Option c – Equal to one unit
The radius of gyration of a body is independent of
(A) the Axis of rotation
(B) the Distance of the axis of rotation
(C) the Mass of the body
(D) the Mass distribution of the body
Option a – the Axis of rotation
A wheel of mass 10 kg has a moment of inertia of 160 kg m² about its own axis. The radius of gyration is :
(A) 10 m
(B) 4 m
(C) 5 m
(D) 6 m
Option b – 4 m
The angular acceleration of a body of mass 50 kg under the action of a torque of magnitude 500 Nm is 25 rad/s². Then the radius of gyration of the body about its axis of rotation is nearly equal to
(A) 0.2 m
(B) 0.6 m
(C) 0.4 m
(D) 1 m
Option b – 0.6 m
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