Electronic Devices and Circuits - Engineering

Q1:

In a p type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to be

A 0.5 eV above valence band

B 0.28 eV above valence band

C 0.1 eV above valence band

D below the valence band

ANS:B - 0.28 eV above valence band

Addition of acceptor atom brings Fermi level closer to valence band.