金属棒在磁场中切割磁感线对电容器充电的质疑

Questioning on Charging Capacitor by Cutting Inductance Line with Metal Bar in Magnetic Field

2018学年第一学期浙江省9+1联盟期中考第20题金属棒在磁场中切割磁感线,对电容器充电,对标准答案表示质疑,并结合普通高中《物理·选修3-1》教材(人教版)课后习题,从物理学视角建构电源模型,理解金属棒切割产生的电动势和电路中的电压的本质、内在规律及相互关系.

The 20th question of Zhejiang 9+1 league mid-term exam in the first semester of the 2018 academic year is a question about charging capacitors by cutting magnetic induction wires with metal bar,this paper questioned the standard answers,and constructed the power supply model from the perspective of physics by combining with the exercises of the 3-1 textbook of physics elective course (PEP) in senior high school,and finally tried to understand the nature,inherent law and relationship between the electromotive force generated by metal bar cutting and the voltage in the circuit.