For an intrinsic semiconductor, if n_h and n_ | vedclass

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(C) In an intrinsic semiconductor, the material is pure and contains no impurities. When thermal energy is supplied, electrons are excited from the va

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$n_h = n_e$

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(C) In an intrinsic semiconductor, the material is pure and contains no impurities. When thermal energy is supplied, electrons are excited from the valence band to the conduction band. This process creates a free electron in the conduction band and a corresponding hole in the valence band. Since each electron-hole pair is generated simultaneously, the number of free electrons per unit volume $(n_e)$ must be equal to the number of holes per unit volume $(n_h)$. Therefore, $n_e = n_h$.

For an intrinsic semiconductor, if $n_h$ and $n_e$ represent the number of holes per unit volume and the number of free electrons per unit volume respectively, then:

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