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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 Solid sphere has a Mass of 20 kg and a radius of 0.8 m. What is the radius of gyration of the sphere about a tangential axis?
a) 0.944 m
b) 0.8 m
c) 0.56 m
d) 0.4 m
Option a – 0.944 m
A disc of Mass 100 g and radius 5 cm rotates about an axis passing through its Centre of Mass. What is its radius of gyration?
a) 0.5 cm
b) 2.5 cm
c) 3.536 cm
d) 6.54 cm
Option c – 3.536 cm
A wheel of Mass 8 kg has a radius of gyration equal to 0.25 m. What torque is required to produce 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
A raw egg and a boiled egg are spun on a table by applying the same torque. Which of the following statements is correct?
a) The boiled egg spins faster
b) The raw egg spins faster
c) The moment of inertia of the boiled egg is smaller than that of the raw egg
d) Statements (a) and (c) are both correct
Option d – Statements (a) and (c) are both correct
If the numerical value of the moment of inertia of a rigid body is equal to its Mass, what is the radius of gyration?
a) Equal to its radius
b) Equal to its diameter
c) Equal to one unit
d) Infinite
Option c – Equal to one unit
The radius of gyration of a body does not depend on which of the following?
a) The axis of rotation
b) The distance of the axis of rotation
c) The Mass of the body
d) The distribution of Mass in 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. What is its radius of gyration?
a) 10 m
b) 4 m
c) 5 m
d) 6 m
Option b – 4 m
A body of Mass 50 kg is subjected to a torque of 500 N·m and acquires an angular acceleration of 25 rad/s². What is the approximate radius of gyration of the body about the axis of rotation?
a) 0.2 m
b) 0.6 m
c) 0.4 m
d) 1 m
Option b – 0.6 m
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