本题目来源于试卷: Electromagnetic Induction and Faraday’s Law and Lenz Law，类别为 美国物理杯赛(Physics Bowl)
[单选题]
08.50:. An infinitely long solenoid passes t gaqv i1bt875ehrough the circ xl9ippn hc6)r)0six -l 57ai iuit as shown. The magnetic field of x9x 0rips-5i ach6 )7ni)lpli the solenoid, directed into the
plane of the page, is weakening which produces a constant emf of magnitude ξ for a closed loop around the outside of the solenoid. Once equilibrium is established in this circuit, what is the voltage across the switch S?
A. 0
B. $\xi$/3
C. $2\xi$/3
D. $\xi$
E. $4\xi$/3
参考答案: E
本题详细解析:
暂无
| 
