Q .     A load of `1` `kg` weight is a attached to one end of a steel wire of area of cross-section `3` `mm^2` and Young's modulus `10^11 N/m^2`. The other end is suspended vertically from a hook on a wall, then the load is pulled horizontally and released. When the load passes through its lowest position the fractional change in length is `(g = 10 m//s^2)`

BITSAT 2008
A

`0.3 × 10^-4`

B

`0.3 × 10^4`

C

`0.2 × 10^-4`

D

None of these

HINT

`Y =(mgl)/(A Delta l)`

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