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Question

A copper sphere attached to the bottom of a vertical spring is oscillating with time period 10 s. If the copper sphere is immersed in a fluid (assume the viscosity of the fluid is negligible) of specific gravity 14 of that of the copper, then time period of the oscillation is

A
5 s
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B
10 s
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C
2.5 s
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D
20 s
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Solution

The correct option is B 10 s
Given, Time period of sphere and spring system (T)=10 s.
Since, the viscosity of liquid is negligible, there is no change in m and K.
Time period remains constant.
Hence, option (b) is correct.

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