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A copper rod of length l(0) at 0^(@)C is...

A copper rod of length `l_(0)` at `0^(@)`C is placed on smooth surface. Now, the rod is heated upto `100^(@)`C. Find the longtidudinal strain developed.
(`alpha`=coefficient of linear expansion)

A

`(100 l_(0)alpha)/(l_(0) + 100 l_(0)alpha)`

B

`100 alpha`

C

zero

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Since, the surface is smooth, so no strees is develped Inside the rod.
Hence, strain is zero
Mathematically, `Y xx` strain = stress `=Y xx 0 = 0`
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