本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 通用国际物理
[单选题]
A circular loop of wire is rotak xhne;v)o7s ;v8 8ho+ mnhzf4ted 0kz,gitw qt72-rj u9;z gd0qjat constant angular speed about an axis whose direction can z7u;q9 tjwk q2gi, z0r-tgj0dbe varied. In a region where a uniform magnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induced $emf$ is to be a maximum?
A. Any horizontal orientation will do.
B. It must make an angle of $45^{\circ}$ to the vertical.
C. It must be vertical.
D. none of the given answers
参考答案: A
本题详细解析:
暂无
| 
