In a n-type semiconductor, as the donar impurities ND increases,

In a n-type semiconductor, as the donar impurities ND increases, the fermi level EF—

1. Remains unalerted
2. Moves towards valence band
3. Moves towards conduction band
4. Shifting depends on temperature

In an n-type semiconductor as the donor impurities N _D increases, the fermi level E_F moves towards conduction band.