The following band-energy diagram represents:

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(D) In the given band-energy diagram,the impurity level is located just below the conduction band $(CB)$.This indicates that the impurity atoms provid

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$n-$ type semiconductor

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(D) In the given band-energy diagram,the impurity level is located just below the conduction band $(CB)$.This indicates that the impurity atoms provide extra electrons that can be easily excited into the conduction band.Such impurity levels are known as donor energy levels,which are characteristic of $n-$ type semiconductors.Therefore,the diagram represents an $n-$ type semiconductor.

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