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Thermal Physics

Cool goIITian

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17 Mar 2010 14:28:07 IST

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A steel rod of length 1 m is heated from 25°C to 75°C keeping its length constant. The longitudinal

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A steel rod of length 1 m is heated from 25°C to 75°C keeping its length constant. The longitudinal strain developed in the rod is (Given: Coefficient of linear expansion of steel = 12 × 10-6/°C)

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Pranav

Blazing goIITian

Joined: 14 Dec 2009

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17 Mar 2010 14:33:40 IST

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6 * 1o-5

silent killer

Blazing goIITian

Joined: 15 Nov 2009

Posts: 564

17 Mar 2010 17:31:08 IST

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temp difference(T)=50 c

L=1 m

when the steel is heated is enpands .since the length is constant it must not change its length.that means we can say that the rod has expanded and again comressed to original length.

let x be the change in length. L be the original length.

x/L=strain

x=L(1+alpha *T )

everything is given.u can solve ir easily.

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