The springs in figure. $A$ and $B$ are identical but length in $A$ is three times that in $B$. The ratio of period $T_A/T_B$ is
The springs in figure. $A$ and $B$ are identical but length in $A$ is three times that in $B$. The ratio of period $T_A/T_B$ is
- A
$\sqrt 3 $
- B
$0.33$
- C
$3$
- D
$1/\sqrt 3 $
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