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A steel wire of uniform cross-sectional ...

A steel wire of uniform cross-sectional area `2mm^(2)` is heated upto `50^(@)` and clamped rigidly at two ends . If the temperature of wire falls to `30^(@)` then change in tension in the wire will be , if coefficient of linear expansion of steel is `1.1 xx 10^(-5)//"^(@)C` and young's modulus of elasticity of steel is `2 xx 10^(11) N//m^(2)`

A

44N

B

88N

C

132N

D

22 N

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