If Young's modulus for a material is zero, then the state of material should be
Solid
Solid but powder
Gas
None of the above
The ratio of diameters of two wires of same material is $n : 1$. The length of wires are $4\, m$ each. On applying the same load, the increase in length of thin wire will be
The load versus elongation graph for four wires of same length and the same material is shown in figure. The thinnest wire is represented by line
Two wires of same length and radius are joined end to end and loaded. The Young's modulii of the materials of the two wires are $Y_{1}$ and $Y_{2}$. The combination behaves as a single wire then its Young's modulus is:
Young's modules of material of a wire of length ' $L$ ' and cross-sectional area $A$ is $Y$. If the length of the wire is doubled and cross-sectional area is halved then Young's $modules$ will be :
Four identical rods are stretched by same force. Maximum extension is produced in