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PhysicsElasticityMiscellaneousMedium2 minPYQ_2020
PhysicsMediumsingle choice

Speed of a transverse wave on a straight wire (mass6.0 g,length60 cmand area of cross-section1.0 mm2is90 m s-1. If the Young's modulus of wire is16×1011 N m-2, the extension of wire over its natural length is:

Options:

Answer:
A
Solution:

v=Tμ
T=μv2
μv2A=Yll
l=μv2lAY
After substituting value ofμ,v,l,AandYwe get
l=0.3mm

Stream:JEESubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous
2mℹ️ Source: PYQ_2020

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