Q .     There is some change in length when a `33000` `N` tensile force is applied on a steel rod of area of cross-section `10^-3 m^2`. The change of temperature required to produce the same elongation, if the steel rod is heated, is (The modulus of elasticity is `3 × 10^11N//m^2` and the coefficient of linear expansion of steel is `1.1 × 10^(-5)°C).`

BITSAT 2008
A

`30^oC`

B

`20^oC`

C

`10^oC`

D

None of these

HINT

`(Delta l)/l = alpha Delta T`

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