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Two loops P and Q are made from a uniform wire. The radii of P and Q are r1 and r2 respectively, and their moments of inertia are l1 and l2 respectively. If l2/l1=4 then r2/r1 equals

(a) 4^2/3

(b) 4^1/3

(c) 4^-2/3

(d) 4^-1/3

Ans. b

(21)

5/5 - (1 vote)

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