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Asked by sarveshvibrantacademy | 18 May, 2019, 01:10: PM
Expert Answer
when the wire is pulled at middle to a distance a, increase in length as shown in figure = PR+RQ
PR+RQ =
hence change in length ΔL = ( a2/ L ) and strain (ΔL/2L) = ( a2 / 2 L2 ) ....................(1)
if Y is youngs modulus, then we have Y = stress / strain = (T/A) / strain ...................(2)
where T is tension in wire, A is area of cross section
using eqn.(1) and (2), we get T =
Answered by Thiyagarajan K | 18 May, 2019, 04:03: PM
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