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On loading a metal wire of cross section...

On loading a metal wire of cross section `10^(-6) m^2` and length 2m by a mass of 210 kg it extends by 16mm and suddenly broke from the point of support. If density of that metal is `8000 kgm^(-3)` and its specific heat is `420 Jkg^(-1)K^(-1)` the rise in temperature of wire is

A

`2.5^@C`

B

`5^@C`

C

`6^@C`

D

`10^@C`

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The correct Answer is:
A
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