If a spring extends by $x$ on loading then energy stored by the spring is ($T$ is tension in spring, $K$ is spring constant)

  • A

    $\frac{{{T^2}}}{{2x}}$

  • B

    $\frac{{{T^2}}}{{2K}}$

  • C

    $\frac{{2K}}{{{T^2}}}$

  • D

    $\frac{{2{T^2}}}{K}$

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