A particle performs simple harmonic motion with a period of $2$ second. The time taken by the particle to cover a displacement equal to half of its amplitude from the mean position is $\frac{1}{ a } s .$ The value of $'a'$ to the nearest integer is.........
  • A$6$
  • B$5$
  • C$4$
  • D$8$
JEE MAIN 2021, Medium
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