A simple pendulum of length l has a brass bob attached at its lower en – McqOptions

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1.	A simple pendulum of length l has a brass bob attached at its lower end. Its period is T. If a steel bob of same size, having density x times that of brass, replaces the brass bob and its length is changed so that period becomes 2T, then new length is [MP PMT 2002]
A.	2 l
B.	4 l
C.	4 l x
D.	\[\frac{4l}{x}\]
Answer» C. 4 l x

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