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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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By admin – 2010 年 03 月 22 日

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