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Question
Dislocations in materials refer to the following type of defect
Options:
A .  Point defect
B .  Line defect
C .  Plane defect
D .  Volumetric defect
Answer: Option B
Dislocations in materials refer to Line defect.
Line defects are lines along which whole rows of atoms in a solid are arranged anomalously.
The resulting irregularity in spacing is most severe along a line called the line of dislocation.
Line defects can weaken or strengthen solids.

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