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Which 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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