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electronics and communication engineering materials and components
1. 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 and above WF are filled
(C): all energy levels below WF are filled, all those above WF are empty
(D): some energy levels, both below and above WF, are filled
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