A spring has length l and force constant k it is cut into two springs of length l₁ and l₂ such that l₁=nl₂ (n = an integer). Mass ‘m’ suspended
from l1oscillates with time period...

• A

  $\mathrm{T}=2\mathrm{\pi }\sqrt{\frac{\mathrm{m}}{(\mathrm{n}+1)\mathrm{K}}}$

• B

  $\mathrm{T}=2\mathrm{\pi }\sqrt{\frac{\mathrm{nm}}{(\mathrm{n}+1)\mathrm{K}}}$

• C

  $\mathrm{T}=2\mathrm{\pi }\sqrt{\frac{\mathrm{m}}{\mathrm{K}}}$

• D

  $\mathrm{T}=2\mathrm{\pi }\sqrt{\frac{(\mathrm{n}+1)\mathrm{m}}{\mathrm{K}}}$