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1仪器的特点及用途实验装置如图1所示.图1(1)特点:①本实验仪器利用牛顿第三定律原理,放在电子天平秤上的磁铁会受到等大的反作用力,电子称的示数会发生变化,读出数值m,间接测量出安培力的大小.提高了通电过程中的装置的稳定性和独立性,减小了测量误差;②使用铷铁硼强磁铁块提供磁场,在通电导线比较短(十几cm),电流不太大(几A)的情况下,能产生10-2 N的安培力;③使用电子称测量精度高,分度值能达到0.01g(建议使用);④测量方便,利用电子天平称的去皮功能,其显示出数值m,则安培力F=mg.
1 instrument features and uses Experimental device shown in Figure 1. Figure 1 (1) features: ① The experimental apparatus using Newton’s third principle, the magnet on the electronic balance scale will be subject to such great reaction force, the electronic scale The number of changes will occur, read out the value of m, indirect measurement of the size of the ampere force to improve the stability of the device during power and independence, reducing the measurement error; ② using NdFeB magnets provide magnetic field , In the power wire is relatively short (more than ten cm), the current is not too large (A few), can produce 10-2 N ampere; ③ using electronic measurement accuracy, the division value can reach 0.01g It is recommended to use); ④Measured easily, the use of electronic scales called peeled function, which shows the value of m, the ampere force F = mg.