Electronic Devices and Circuits - Engineering

Q1:

If E is energy level of electron and EF is Fermi level, then

A all quantum states with E less than EF will be occupied at T = 0

B all quantum states with E less than EF will be empty at T = 0

C some quantum states with E less than EF will be occupied at T = 0

D none of the above

ANS:A - all quantum states with E less than EF will be occupied at T = 0

According to me, Ef is less than E is correct.