A metal wire is loaded up to the limit of proportionality. Which statement is correct?
Hooke’s law is not obeyed when the load is increased from zero to this point.
When the load is increased beyond the limit of proportionality, the diameter of the wire will increase.
When the load is removed, the wire returns to its original length.
Up to the limit of proportionality, there is no change in the shape of the wire.
