A) α=NANB \alpha = \frac{N_A}{N_B}α=NB NA B) α=NPND \alpha = \frac{N_P}{N_D}α=ND NP C) α=N0NB \alpha = \frac{N_0}{N_B}α=NB N0 D) α=NDNP \alpha = \frac{N_D}{N_P}α=NP ND
A) α=NANB \alpha = \frac{N_A}{N_B}α=NB NA B) α=NPND \alpha = \frac{N_P}{N_D}α=ND NP C) α=N0NB \alpha = \frac{N_0}{N_B}α=NB N0 D) α=NDNP \alpha = \frac{N_D}{N_P}α=NP ND