question_answer

The spring extends by x on loading, then energy stored by the spring is : (if T is the tension in spring and k is spring constant)                                                             [Pb. PMT 2003]

A)             \[\frac{{{T}^{2}}}{2k}\]    

B)             \[\frac{{{T}^{2}}}{2{{k}^{2}}}\]

C)             \[\frac{2k}{{{T}^{2}}}\]    

D)             \[\frac{2{{T}^{2}}}{k}\]