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 negligilbe) of specfic gravity `(1)/(4)` of that of the copper, then time period of the oscillation isA. 5 sB. 10 sC. 2.5 sD. 20 s

A copper sphere attached to the bottom of a vertical spring is oscilla

1.	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 negligilbe) of specfic gravity `(1)/(4)` of that of the copper, then time period of the oscillation isA. 5 sB. 10 sC. 2.5 sD. 20 s
Answer» Correct Answer - B (b) Given, time period, T =10 s `therefore T=2pisqrt((m)/(k))` when viscous the system is immersed in liquid with specfic gravity `(1)/(4)th` of the copper, the liquid is non-viscous , so the time period would not be changed because , there is no change in m and k.

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