Q 1555656564.     A copper wire of length `2.2 m` and a steel
wire of length `1.6 m`, both of diameter
`3.0 mm` are connected end to end. When
stretched by a force, the elongation in length
`0.'50 mm` is produced in the copper wire. The
stretching force is-

`(Y_(cu) = 1.1 xx 10^(11) N//m^(2))`
,

VIT 2013
A

`5.4xx10^(2) N`

B

`3.6xx10^(2) N`

C

`2.4 xx 10^(2) N`

D

`1.8xx10^(2) N`

HINT

` Y = F/(pir^(2)) xx (l)/(Delta l)`

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