問題詳情
9. Which quantity cannot be measured by Hall effect?
(A) The external magnetic field
(B) The sign of the charge carriers
(C) Electron's charge to mass ratio
(D) The type (N- or P-type) of semiconductor
(E) The density of free electrons inside metal
參考答案
答案:C
統計:A:0,B:0,C:0,D:0,E:0
難度:計算中