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A metallic rod l cm long, A square cm in...

A metallic rod l cm long, A square cm in cross-section is heated through `t^(@)"C"`. If Young’s modulus of elasticity of the metal is E and the mean coefficient of linear expansion is `alpha` per degree celsius, then the compressional force required to prevent the rod from expanding along its length is

A

`EA alpha t`

B

`E A alpha t//(1+ alpha t)`

C

`EA alpha t (1- alpha t)`

D

`E//alpha t`

Text Solution

Verified by Experts

The correct Answer is:
B
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