The MI of ring of radius ‘\(R\)’ and mass ‘\(M\)’ about its central axis is _____

Q.1 (i) The MI of ring of radius ‘\(R\)’ and mass ‘\(M\)’ about its central axis is _____

A. \(2MR^2\)

B. \(\dfrac{MR^2}{2}\)

C. \(MR^2\)

D. \(\dfrac{3}{2}MR^2\)

Doubtly Asked 28 Oct 2026 Board exam · June 2026 hsc 12th Save WhatsApp Report

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Best answer

Answer: C. \(MR^2\)

Answer: (c) \(MR^2\)

Every mass element of a thin ring is at the same distance \(R\) from the central axis (perpendicular to its plane), so \(I=\sum m_i R^2=MR^2\).

Doubtly AI · 28 Oct 2026 AI-verified · Oct 2026 Report

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