A copper and a steel wire of same diameter are connected end to end. A deforming force F$$_1$$ is applied to the wire which causes an elongation of 1 cm. The two wires will have

A force F applied on the wire of radius r and length L and change in the length of the wire is $$l$$. If the same force F is applied on the wire of the same material and radius 4r and length $$4l$$, then change in length of the other wire is,

Within the elastic limit, the corresponding stress is known as

A wire is stretched to double of its length. The strain is