The length of a metal wire is L, when it is subjected to tension T. If the tension is increased to T + ΔT, the length becomes L + ΔL. The natural length of the wire is
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\(\frac{{L\,(\vartriangle T)\, - \,(\vartriangle L)\,T}}{{\vartriangle T}}\)
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\(L\, - \,2\triangle L\)
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\(\vartriangle L\,\left( {\frac{{\vartriangle T}}{T}} \right)\)
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\(\frac{{T\,\left( {\vartriangle L} \right)\, - \,L\,\left( {\vartriangle T} \right)}}{{\vartriangle T}}\)
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Question Not Attempted