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62. One quarter sector is cut from a uniform circular disc of radius R. This sector has mass M. It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc. Its moment of inertia about the axis of rotation is

(a)    1/2 MR2

(b)    1/4 MR2

(c)  1/8 MR2

(d) √2 MR2

Ans. a

(6)

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(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

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