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Which outcome results when an ionic crystal exceeds yield strength?

A)Formation of mobile dislocation defects
B)Increase in intrinsic carrier concentration
C)Rapid propagation of electrical current
D)Shift in the Fermi energy level

💡 Explanation

Exceeding yield strength causes slip via dislocation motion because the material undergoes permanent, non-elastic deformation. The mechanism is dislocation slip rather than electrical effects, therefore dislocation defects are the result beyond yielding.

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