railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Devices Semiconductors Semiconductor Materials
If density of states in conduction band and density of states in valence band are not equal, then the Fermi level in intrinsic semiconductor is-
1
\(\frac{{{E_c} - {E_v}}}{2} + \frac{{{N_C} + {N_v}}}{2}\)
2
\(\frac{{{E_C} + {E_v}}}{2}\)
3
\(\frac{{{E_C} + {E_v}}}{2} - \frac{{kT}}{2}\ln \frac{{{N_C}}}{{{N_v}}}\)
4
\(\frac{{{E_C} + {E_v}}}{2} + \frac{{kT}}{2}\ln \frac{{{N_C}}}{{{N_v}}}\)