A metal wire  of coefficient of linear expansion and Young modulus are `1xx10^(-5)//""^(@)C`
Channel: Doubtnut
Date: 2020-06-07

A metal wire  of coefficient of linear expansion and Young modulus are `1xx10^(-5)//""^(@)C` and `10^(11)N//m^(2)` respectively  is tied between two points rigidly at a temperature  `40^(@)C`. If the temperature is decreased to `20^(@)C` the force required to hold the wire in newton  is ( the length of the wire is 40 cm and area of cross section is `1 cm^(2)`)