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Question

A uniform spring has a certain mass suspended from it and its period for vertical oscillations is T1 .  The spring is now cut into two equal halves and the same mass is suspended from one of the halves.  The period of vertical oscillations now is T2 .  The ratio T2T1  is


A
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B
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C
2
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D
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Solution

The correct option is B
If a spring of force constant k is cut into two equal halves, the force constant of each half becomes 2k.  Hence the correct choice is (b).

Physics

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