If a spring has time period $T$, and is cut into $n$ equal parts, then the time period of each part will be
A$T\sqrt n $
B$T/\sqrt n $
C$nT$
D$T$
AIEEE 2002, Easy
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B$T/\sqrt n $
b (b)When spring is cut into $n$ equal parts then spring constant of each part will be nk and so using $T \propto \frac{1}{{\sqrt k }},$ time period will be $T/\sqrt n .$
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