A uniform disc is rotating with angular velocity ๐ . If its mass is doubled and radius is halved, what happens to its moment of inertia about its axis?
This question focuses on how mass and radius affect the moment of inertia of a disc.
Design multiple-choice questions (MCQs) for CBSE Class 11 Physics, Chapter 6: “System of Particles and Rotational Motion,” following the NCERT syllabus for 2024-2025. Focus on essential concepts like the center of mass, torque, angular momentum, rotational kinematics, dynamics and equilibrium. Provide a mix of theoretical and numerical questions with varying difficulty levels to assess students’ understanding and enhance their problem-solving abilities. Ensure that the questions are clear, concise and aligned with NCERT guidelines to aid effective preparation for exams. The aim is to reinforce key concepts and promote a deeper understanding of rotational motion principles.
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Moment of inertia of a disc about its axis is ๐ผ = 1/2๐๐ ยฒ. When M is doubled and R is halved, I = 1/2.2M.(R/2)ยฒ = 1/2MRยฒ. 1/2 = 1/2 Iแตขโแตขโแตขโโ.
This question related to Chapter 6 physics Class 11th NCERT. From the Chapter 6 System of Particles and Rotational Motion. Give answer according to your understanding.
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