Physics · 2019
JEE Main · 12 January 2019, Shift 1 · Q7
Let the moment of inertia of a hollow cylinder of length 30 cm (inner radius 10 cm and outer radius 20 cm), about its axis be I. The radius of a thin…
Let the moment of inertia of a hollow cylinder of length $\displaystyle 30$ cm (inner radius $\displaystyle 10$ cm and outer radius $\displaystyle 20$ cm), about its axis be I. The radius of a thin cylinder of the same mass such that its moment of inertia about its axis is also I, is :
Official answer
(4)
$\displaystyle 16$ cm
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.