Work done in stretching a wire by 1mm is 2J. Then calculate the work done for stretching another wire of same material but with double the radius and half the length by 1mm.

A wire of initial length L and radius r is stretched by a length l. Another wire of same material but with initial length 2L and radius 2r is stretched by a length 2l. The ratio of the stored elastic energy per unit volume in the first and second wire is,

Keeping one end of a wire of length L and radius r fixed, a force F is applied at the other end to elongate it by l. Another wire made of same material but of length 2L and radius 2r is stretched by a force 2F. Its increase in length will be

A wire of length L and radius r when stretched with a force F changes in length by l. What will be the change in length of a wire of same material having length 2L, radius 2r and stretched by a force 2F?

Find an expression for the potential energy in a stretched wire. (Similar question : Find out an expression for the work done by a force in stretching a length of a wire with respect to strain produced in the wire.

Work done for a certain spring when stretched through 1mm is 10J . The amount of work that must be done on the spring to stretch if further by 1mm is

A lump of copper is stretched into a wire 5mn in diameter. Another wire of 1 cm diameter is made from another lump of copper of the same mass. Find the ratio of the resistances of the two wires.

Let L be the length and d be the diameter of cross section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases, the extension of wire will be the maximum? L= 200 cm, d=0.5 mm L= 300 cm, d=1.0 mm L= 50 cm, d= 0.05 mm L=100 cm, d=0.2 mm

A wire is stretched by 1% but volume remains constant, then -