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← ScienceWhich outcome occurs when a polycrystalline silicon's grain boundaries hinder electron flow?
A)Increased electrical resistance occurs✓
B)Enhanced thermal conductivity results
C)Increased piezoelectric generation results
D)Enhanced superconducting properties result
💡 Explanation
When grain boundaries impede electron flow then increased electrical resistance occurs because the electrons scatter at these interfaces, a mechanism called grain boundary scattering. Therefore, resistance increases, rather than alternative effects like thermal conductivity because the electron transport is directly affected by the crystal structure.
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