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The temperature of a wire of length 1 me...

The temperature of a wire of length 1 metre and area of cross-section `1 cm^(2)` is increased from `0^(@)C` to `100^(@)C`. If the rod is not allowed to increased in length, the force required will be `(alpha=10^(-5)//.^(@)C and Y =10^(11) N//m^(2))`

A

`10^(3) N`

B

`10^(4)` N

C

`10^(5) N`

D

`10^(9) N`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) F=Force developed `F=Yaalpha(Deltatheta)`
`=10^(11)xx10^(-4)xx10^(-5)xx100=10^(4)N`
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  15. An elevator cable is to have a maximum stress of 7xx10^(7) Nm^(-2) to ...

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