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# practice_Exam+_1 - ECE 3040 Microelectronic Circuits...

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ECE 3040 Microelectronic Circuits Practice Exam 1 Multiple Choice and True/False (Circle the letter of the most correct answer, 20%) 1.) (2-points) True or False: In equilibrium, an electric field can NOT exist, otherwise a current would have to flow. 2.) (2-points) True or False: An intrinsic material has equal concentrations of electrons and holes. 3.) (2-points) True or False: To obtain a p-type elemental group four semiconductor, you need to dope with an element group five of the periodic table. 4.) (2-points) True or False: In equilibrium, if the electron density is increased by doping, the hole density must also increase to maintain charge balance. Select the best answer for 5-8: 5.) (3-points) The probability that a state is UNOCCUPIED is given by: a.) The Fermi-Dirak integral of order 1/2 b.) The fermi-distribution function c.) The density of states function d.) (1-f(E)) where f(E)=the fermi-distribution function 6.) (3-points) The following energy band diagram indicates the material is: a.) p-type E c b.) n-type E i =E f c.) intrinsic d.) Silicon E v 7.) (3-points) For to the following band diagram, what is known from the information given:

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practice_Exam+_1 - ECE 3040 Microelectronic Circuits...

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