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Two metal rods are fixed end to end betw...

Two metal rods are fixed end to end between two rigid supports, as shown in figure. Each rod is of length 'l' and area of cross-section is A. When the system is heated up, determine the conditioin whenthe juction between rods does not shift.
[Given, `Y_(1)` and `Y_(2)` are Young's modulus of materials of the rods, `alpha_(1)` and `alpha_(2)` are coefficient at linear expansion.

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