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6.	The moment of inertia of a uniform circular disc about its diameter is 100 gcm2. What is its moment of inertia about an axis perpendicular to its plane.
	A.	500 gcm²
	B.	100 gcm²
	C.	200 gcm²
	D.	700 gcm²

	Answer: Option C


	Explanation:
	By theorem of perpendicular axes, moment of inertia of the disc about an axis perpendicular to its plane, I = Sum of the moments of inertia about two perpendicular diameters I = I_d+I_d=2×1/4×MR²=2×1000= 200 gcm².



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Published by:Michael Daani

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