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The greatest length of a steel wire that...

The greatest length of a steel wire that can be hung vertically without breaking (breaking stress for steel `= 7.9 xx 10^(8)` N/m^2, density of steel wire `= 7.9 xx 10^(3) kg//m^(3)`)

A

`9xx10^(9)m`

B

`10^(4)m`

C

`10^(3)m`

D

`10^(2)m`

Text Solution

Verified by Experts

The correct Answer is:
B
Length`=("Breaking stress")/("density" xx g)`
`=(7.9xx10^(8))/(7.9xx10^(3)xx10))=10^(4)m`
So the correct choice is (b).
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