If WF is the Fermi level, then in a metal at T = 0

  • A. all energy levels above WF filled, all those below WF are empty
  • B. all energy levels below WF are filled, all those above WF are empty
  • C. some energy levels, both below and above WF, are filled
  • D. all energy levels below and above WF are filled
  • Correct Answer: Option B

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