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a copper wire and a steel wire of the same diametre having lengths 100cm and 200cm respectively. They are connected end to end when a force is applied, their length increases 1cm combinely. Find how much each wire is elongated? Given that Y of copper is 12*10 10 dyn/cm 2 and Y of steel is 20*10 11 dyn/cm 2 .

  • a copper wire and a steel wire of the same diametre having lengths 100cm and 200cm respectively. They are connected end to end when a force is applied, their length increases 1cm combinely. Find how much each wire is elongated? Given that Y of copper is 12*1010 dyn/cm2 and Y of steel is 20*1011 dyn/cm2.

Grade:11

1 Answers

Arun
25763 Points
3 years ago
Lsteel = Lcu and Asteel = Acu a) Stress of cu/Stress of st = Fcu/Acu Ag/Fg = Fcu/Fst = 1 b) Strain = ∆Lst/∆lcu = Fst Lst/AstYst . Acu Ycu/ Fcu lcu (∴ Lcu = lst ; Acu = Ast)

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