一个半径为r的半圆形线圈,以直径ab为轴匀速转动,转速为n,ab的左侧有垂直于纸面向里的匀强磁场,磁感应强度为B,M和N是两个集流环负载电阻为R,电流表和连线导线的电阻不计. 1,从图示位置转
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![一个半径为r的半圆形线圈,以直径ab为轴匀速转动,转速为n,ab的左侧有垂直于纸面向里的匀强磁场,磁感应强度为B,M和N是两个集流环负载电阻为R,电流表和连线导线的电阻不计. 1,从图示位置转](/uploads/image/z/11052766-46-6.jpg?t=%E4%B8%80%E4%B8%AA%E5%8D%8A%E5%BE%84%E4%B8%BAr%E7%9A%84%E5%8D%8A%E5%9C%86%E5%BD%A2%E7%BA%BF%E5%9C%88%2C%E4%BB%A5%E7%9B%B4%E5%BE%84ab%E4%B8%BA%E8%BD%B4%E5%8C%80%E9%80%9F%E8%BD%AC%E5%8A%A8%2C%E8%BD%AC%E9%80%9F%E4%B8%BAn%2Cab%E7%9A%84%E5%B7%A6%E4%BE%A7%E6%9C%89%E5%9E%82%E7%9B%B4%E4%BA%8E%E7%BA%B8%E9%9D%A2%E5%90%91%E9%87%8C%E7%9A%84%E5%8C%80%E5%BC%BA%E7%A3%81%E5%9C%BA%2C%E7%A3%81%E6%84%9F%E5%BA%94%E5%BC%BA%E5%BA%A6%E4%B8%BAB%2CM%E5%92%8CN%E6%98%AF%E4%B8%A4%E4%B8%AA%E9%9B%86%E6%B5%81%E7%8E%AF%E8%B4%9F%E8%BD%BD%E7%94%B5%E9%98%BB%E4%B8%BAR%2C%E7%94%B5%E6%B5%81%E8%A1%A8%E5%92%8C%E8%BF%9E%E7%BA%BF%E5%AF%BC%E7%BA%BF%E7%9A%84%E7%94%B5%E9%98%BB%E4%B8%8D%E8%AE%A1.+1%2C%E4%BB%8E%E5%9B%BE%E7%A4%BA%E4%BD%8D%E7%BD%AE%E8%BD%AC)
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