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範例:磁力與靜力平衡

如右圖所示,一線性彈簧吊一矩形迴線,迴線下端在均勻磁場B中。當迴線上通電流1A時,彈簧伸長量1.9cm;電流2A時,伸長量為3.3cm。則未通電流時,彈簧伸長量為(A)0.2cm (B)0.4cm (C)0.5cm (D)0.8cm (E)1.2cm


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Posted in 載流導線在磁場中的磁力.

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