A) 1 : 4
B) 2 : 1
C) 4 : 1
D) \[\sqrt{2}:1\]
Correct Answer: B
Solution :
Ratio of moment of inertia of two rings \[\frac{{{I}_{1}}}{{{I}_{2}}}=\frac{m{{(2R)}^{2}}}{2m{{R}^{2}}}=2:1\]
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