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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Radius of gyration of a thin rod of mass 1 kg about an axis perpendicular to its length and passing through its centre is 3 m\sqrt 3 \,m . Then length of the rod is
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Correct option: B
6 m
Option B (20∘C20^{\circ} \mathrm{C}) is correct because it is the temperature at which the pendulum clock neither gains nor loses time.

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