試卷名稱:106年 - 學士後西醫物理及化學106物理#77053
年份:106年
科目:學士後西醫物理及化學
40. A cyclotron has a dee radius R and is operated at an oscillator frequency f in Hz. What is the magnitude of the magnetic field B needed for deuterons to be accelerated in the cyclotron? The mass of the deuteron is m in kilograms, f is in Hz, and B is in Tesla.
(A) 2πmfR /q
(B) 2πmf/ (Rq)
(C) 2πmf /q
(D) 
(E) 