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Three rods of equal of length are joined...

Three rods of equal of length are joined to from an equilateral triangle ABC. `D` is the midpoint of AB. The coefficient of linear expansion is `alpha_(1)` for AB and `alpha_(2)` for `AC` and `BC` . If the distance `DC` remains constant for small changes in temperature,

A

`alpha_1=alpha_2`

B

`alpha_1 =2alpha_2`

C

`alpha_1=4alpha_2`

D

`alpha_1=1/2alpha_2`

Text Solution

Verified by Experts

The correct Answer is:
C
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