JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Analyzing +4 | -1

Two discs

P

and

Q

having equal masses and thickness but densities '

\rho_1

' and '

\rho_2

' respectively, are such that

\rho_1 < \rho_2

. The moment of inertia of the disc

P

and

Q

are related as

View answer and explanation

Correct option: D

\mathrm{I}_{\mathrm{P}} > \mathrm{I}_{\mathrm{Q}}

Option D (

\mathrm{I}_{\mathrm{P}} > \mathrm{I}_{\mathrm{Q}}

) is correct because moment of inertia is inversely proportional to density when mass and thickness are constant, and

\rho_1 < \rho_2

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