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Show that the Young.s modulus of the mat...

Show that the Young.s modulus of the material of a wire is equal to the stress required to double the initial length of the wire. Assume that Hookes law holds good throughout the process.

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Consider a uniform wire of length l . Cross-sectional area A, Young's modulus of the material of the wave is Y. Some information related to the wire is given in column-1 and dependence of the result is given in column-2. Then match the approprite choice between the columns and match the list given in options {:("Column-I"" ""Column-II"),("(A) Let us suspend wire vertically from a"" ""(p) Young'sModulus" ),("rigud support and attach a mass m at"),("its lower end. If the mass is slightly pulled"),("down and released, it executes S.H.M"),("of a time period which will depend on"),("(B) Work done in stretching the wire up to length"" ""(q) elongation (x)"),(l+x "will depend on"),("(C) If the given is fixed between two rigid"" ""(r) length (l)"),("supports and its temperature is decreased"),("thermal stress that develops in the wire"),("will depend on"),("(D) If the wire is pulled at its ends equal and"" ""(s) area of cross-section (A) "),("opposite forces of magnitude F so that it"),("undergoes an elongation x, according to"),("Hook's law, F=kx, where k is the force"),("constant.Force constant (k) of the wire"),("will depend on"):}

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