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In case of Bulk's modulus(K),volumetric strain,i.e.,(deltaV/V)is taken as negetive as the volume of the body decreases.So,in case of Young's modulus(Y),when the length of the string decreases, why is the longitudinal strain,i.e.,(l/L) not taken as negetive?

Asked by SOURAV BHATTACHARYYA 25th October 2013, 9:39 PM
Answered by Expert
Longitudinal strain (l/L) is taken positive for elongation and negative for compression of length.
However, in case of a string, the deforming force generally elongates the string; hence longitudinal strain comes out to be positive.
Answered by Expert 30th October 2013, 3:46 PM
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