1.

On loading a metal wire of cross section 10^(-6) m^(2)and length 2m by 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 (g=10 "ms"^(-2) )

Answer»

`2.5^(@) C`
`5^(@) C`
`6^(@) C`
`10^(@) C`

ANSWER :A


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