When a force is applied along the length of the wire

Choose the correct alternative (a), (b), (c) or (d) for each of the questions given below : A copper and a steel wire having same length and diameter are joined end-to-end. When a force is applied at the end of the wire, the net length of the wire increases by 1 cm. The wires will have :

Equal stretching force is applied along the length of two identical wires made of different substances A and B. It is observed that the elongation of B is less than A. Then,

A force F is applied on the wire of radius r and length L and change in the length of wire is l . If the same force F is applied on the wire of the same material and radius 2r and length 2L. Then the change in length of the other wire is

How does electric current flow along a conductor , when electric field is applied along the length of conductor ?

How does electric current flow along a conductor , when electric field is applied along the length of conductor ?

How does electric current flow along a conductor, when electric field is applied along the length of conductor ?

The length of a spring is alpha when a force of 4N is applied on it and the length is beta when 5N is applied. Then the length of spring when 9 N force is applied is-

The length of a spring is alpha when a force of 4N is applied on it and the length is beta when 5N is applied. Then the leng of spring when 9 N force is applied is-

The length of a spring is alpha when a force of 4N is applied on it and the length is beta when 5N is applied. Then the leng of spring when 9 N force is applied is-