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Define strain energy.

AIt refers to external work done on a bar.

BIt refers to a change in the length of a bar.

CIt is the potential energy stored by an elastic body when deformed.

DIt is the energy released by a bar during the loading process.

Answer:

C. It is the potential energy stored by an elastic body when deformed.

Read Explanation:

Strain energy is the potential energy stored by an elastic body when deformed. It is calculated by, $U = \frac{P^2L}{ 2EA}$

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