..--_-:-iw-@
F3Q.
T) (
rrUdrvc DHSp rp. n6 cui rranur
-
KHoA vAr r-Y
CQng hoi Xi hQi Chfi nghia ViQt nam D6c l6p - TrJ do - Hanh phfc
BS rru Hec pnAN: vAr ry rudNc KE _ Hp cuNHAN Thdi gian lim bdi: 120 phrit
CAu I : Khf electron trong Fe. U Dung c6ng thric tt4 t5 tr4ng th6i dk(p) cria c6c electron c6 ttQ l6n dQng lugng trong khoingp viLp + dp dE mn truc fidp dQng luqng Fermi vd suy ra bi6u thric cria n[ng luqng Fermi. 2/ Cho bii5t so electron ho'6 tr! cta m6i nguyon ta Feh 2 vd mric n6ng luqng Fermi cria Fe ld ll,l eV- Cho h=6,625x10-3a,/.s, kh6i luqng electron : 9,lx l0-3rftg: H6y tinh mflt rlQ nguy6n tft Fe. Cho : leV = l,6x 10-reJ
he khi Bose li tudng 6 nhiet d0 z vd c6 th6 ho6 hqc p. Gihithich.
Dao tlQng t'fr ilidu hoi lugmg tr?
------t-6
Cffu II: S{ ne! trung binh cria khi Bose ti tu&ng
llHay viist bi6u thric vd vE sg biiSn thiOn cfia s6 hpt trung binh N theo ndng lucrng cria
2/vc ton cunq mQt dd thi cdc Ghi chri: o C6c c6u I,If, vi III ilQc lgp nhau. o Sinh vi6n khdng iltf{c st? aUnEid- . 'HC't-fi -+l''1 bn D,7
