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(D) In the provided energy band diagram,the open circles represent holes in the valence band $(E_v)$,and the filled circles represent electrons in the

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an $p-$ type semiconductor

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(D) In the provided energy band diagram,the open circles represent holes in the valence band $(E_v)$,and the filled circles represent electrons in the conduction band $(E_c)$.By observing the diagram,we can see that the number of holes in the valence band is significantly greater than the number of electrons in the conduction band.In a semiconductor,if the majority charge carriers are holes,it is classified as a $p-$ type semiconductor.Therefore,the material is a $p-$ type semiconductor.

In the energy band diagram of a material shown below,the open circles and filled circles denote holes and electrons respectively. The material is

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