What is the Bulk modulus for a perfect rigid body?

Identical springs of steel and copper are equally stretched. On which, more work will have to be done?

What is the Young’s modulus for a perfect rigid body?

A wire of length L and radius r is clamped rigidly at one end. When the other end of the wire is pulled by a force f, its length increases by l. Another wire of the same material of length 2L and radius 2r, is pulled by a force 2f. Find the increase in length of this wire

A steel rod (Y= 2.0 × 10¹¹ Nm^-2; and α = 10^-5 C^-1) of length 1 m and area of cross-section 1 cm² is heated from 0° C to 200° C, without being allowed to extend or bend. What is the tension produced in the rod?

Original Question has and α = 10^-5