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| 2017/06/10 01:00:35瀏覽31｜回應0｜推薦0 | |
| 標題: Physics - Electromagnetism 01 發問:
此文章來自奇摩知識+如有不便請留言告知 A free electron travelling horizontally with speed v enters a uniform vertical magnetic field B. The path of the electron is a vertical circle. Explain why it is incorrect.最佳解答: Since the directions of B-field, velocity of electron and magnetic force on the electron should be mutually perpendicular, if the path of the electron is a vertical circle, it means that the centripetal force (resulting from the magnetic force) on the electron lies in the vertical plane, implying that the force has components in the B-field direction at some instant which disobeys the rule of mutual perpendicular. 其他解答: |
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