A brass wire 1.8 m long at 27 ^(@) C is held taut with little tension between two rigid supports. If the wire is cooled to a temperature of- 39 ^(@) C. what is the tension developed in the wire, if its diameter is 2.0 mm ? Co-efficient of tear expansion of brass= 2.0 xx 10^(-5) K^(-1), Young's modulus of brass =0.91 xx 10^(11) Pa.

A brass wire 1.8 m long at 27 ^(@) C is held taut with little tension

1.	A brass wire 1.8 m long at 27 ^(@) C is held taut with little tension between two rigid supports. If the wire is cooled to a temperature of- 39 ^(@) C. what is the tension developed in the wire, if its diameter is 2.0 mm ? Co-efficient of tear expansion of brass= 2.0 xx 10^(-5) K^(-1), Young's modulus of brass =0.91 xx 10^(11) Pa.
Answer» SOLUTION :`3.8 XX 10^(2) N`