alleryWhich of the following is the correct definition of **stress** in a deformed body?
Athe change in length per unit original length
Bthe internal restoring force per unit area
Cthe external force applied to the body
Dthe volume change per unit applied force
Answer & Solution
Correct answer: B. the internal restoring force per unit area
Stress $\sigma = F/A$ is the internal restoring force per unit cross-sectional area that the body develops to resist deformation.
Option A defines *strain* (a dimensionless ratio).
**Option C is the applied force itself, not stress.**
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