AB is an iron wire, CD is a copper wire of same length and same cross-section as AB. The rod BD is 80cm long. A load of 2kgwt is suspended from the rod. At what distance x, should the load be suspended from the point B for the rod to remains in horizotal position.

AB is an iron wire, CD is a copper wire of same length and same cross-

1.	AB is an iron wire, CD is a copper wire of same length and same cross-section as AB. The rod BD is 80cm long. A load of 2kgwt is suspended from the rod. At what distance x, should the load be suspended from the point B for the rod to remains in horizotal position.
Answer» <html><body><p></p>Solution :`Y_(CU)=11.8xx10^(10)(<a href="https://interviewquestions.tuteehub.com/tag/n-568463" style="font-weight:bold;" target="_blank" title="Click to know more about N">N</a>)/(m^(2)), Y_(Fe)=19.6xx0^(10)(N)/(m^(2))` <br/> The rod will remain horizontal if elongation of both the wires is same `e_(1)=e_(2)` <br/> `(T_(1)L)/(pir^(2)Y_(1))=(T_(2)gL)/(pir^(2)Y_(2)) <a href="https://interviewquestions.tuteehub.com/tag/rarr-1175461" style="font-weight:bold;" target="_blank" title="Click to know more about RARR">RARR</a>(T_(1))/(Y_(1))=(T_(2))/(Y_(2))=(T_(1))/(T_(2))=(Y_(1))/(Y_(1))=(11.8xx10^(10))/(19.6xx10^(10))=(59)/(<a href="https://interviewquestions.tuteehub.com/tag/98-342802" style="font-weight:bold;" target="_blank" title="Click to know more about 98">98</a>)` <br/> `T_(2)=T_(1)(80-x),(98)/(59)x=80- x rArr 98x=59xx80-59x` <br/> `157x=59xx80, x=(59xx80)/(<a href="https://interviewquestions.tuteehub.com/tag/157-1792572" style="font-weight:bold;" target="_blank" title="Click to know more about 157">157</a>) rArr x= 30 cm`</body></html>