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[" 12.A disc of radius "R" is pivoted at...

[" 12.A disc of radius "R" is pivoted at its rim.The period for small oscillations about an "],[" perpendicular to the plane of disc is "],[[" (a) "2 pi sqrt((R)/(g))," (b) "2 pi sqrt((2R)/(g))],[" (c) "2 pi sqrt((2R)/(3g))," (d) "2 pi sqrt((3R)/(g))]]

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