Question

The average energy of an electron is related to Fermi energy (at absolute zero) as :

• A. $\bar{E} = \frac{4}{5} E_F$
• B. $\bar{E} = \frac{5}{8} E_F$
• C. $\bar{E} = \frac{3}{5} E_F$
• D. $\bar{E} = \frac{9}{8} E_F$

Hint:

This is a standard derived constant in solid-state physics for 3D systems. For a 1D system, $\bar{E} = \frac{1}{3} E_F$. For a 2D system, $\bar{E} = \frac{1}{2} E_F$. For standard 3D bulk materials, always remember $\bar{E} = \frac{3}{5} E_F$.

Answer 1

The Correct Option is C