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Which outcome occurs when excessive doping occurs in germanium crystal?

A)Conductivity approaches metallic levels
B)Band gap increases significantly
C)Intrinsic carrier concentration lowers
D)Debye screening length increases

💡 Explanation

Conductivity increases sharply because donor/acceptor concentration surpasses intrinsic carriers, causing degenerate semiconductor behaviour. Therefore it turns into a poor metallic conductor rather than becoming insulating, where the band gap would matter.

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