Question

Select One Option Correct from the following : One end of a long metallic wire of length L is tied to the ceiling. The other end is tied to a massless spring of spring constant k. A mass m hangs freely from the free end of the spring. The area of cross-section and the Young’s modulus of the wire are A and Y respectively. If the mass is slightly pulled down and released, it will oscillate with a time period T equal to
(A)$2\pi\sqrt{\frac{m}{k} }$
(B)$2\pi\sqrt{\frac{m(YA+kL)}{YAk} }$
(C)$2\pi\sqrt{\frac{m(YA)}{kL} }$
(D)$2\pi\sqrt{\frac{mL}{YA} }$

Answer 1

b option is correct I think

Answer 2

A is correct mark me brainlist