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Which of the following expressions represent the Fermi probability function?

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Which of the following expressions represent the Fermi probability function?

(a) fF(E)=exp(-[E-EF]/KT)

(b) fF(E)=exp(-[EF-E]/KT)

(c) fF(E)=exp([E-EF]/KT)

(d) fF(E)=exp(-[EF-E]/KT)

This question was posed to me in my homework.

Enquiry is from Electrons and Holes in Semiconductor in chapter Conduction in Semiconductors of Electronic Devices & Circuits

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Best answer
The correct choice is (b) fF(E)=exp(-[EF-E]/KT)

The best explanation: It is the correct formula for the Fermi probability function.

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