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A copper collar is to fit tightly about ...

A copper collar is to fit tightly about a steel shaft that has a diameter of 6 cm at `20^@C`. The inside diameter of the copper collar at the temperature is `5.98cm`
Q. The tensile stress in the copper collar when its temperature returns to `20^@C` is `(T=11xx10^10N//m^(2))`

A

`1.34xx10^5 N//m^(2)`

B

`3.68xx10^-12 N//m^(2)`

C

`3.68xx10^8 N//m^(2)`

D

`1.34xx10^-12 N//m^2`

Text Solution

Verified by Experts

The correct Answer is:
C
Tensile stress `=TalphaDeltatheta`
`=11xx10^(10)xx17xx10^-6xx(217-20)` ltbr. `=3.68xx10^(+8)(N)/(m^2)`
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