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Three rods of equal lengths are joined t...

Three rods of equal lengths are joined to form an equilateral triangle ABC. D is the mid-point of AB. The coefficient of linear expansion is `alpha_1`, for material of rod AB and `alpha_2`, for material of rods of rods AC and BC. If the distance DC remains constant for small changes in temperature, then

A

`alpha_(1) = 2 alpha_(2)`

B

`alpha_(1) = 4 alpha_(2)`

C

`alpha_(1) = 8 alpha_(2)`

D

`alpha_(1) = alpha_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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