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22F-D1P5N113
22F-D1P5N113
电流(运动电荷)的周围存在磁场,他对外的重要表现是:对引入场中的运动试探电荷、载流导体或磁铁有磁场力的作用,因此可用磁场对运动试探电荷的作用来描述磁场,并由此引入磁感应强度B作为定量描述磁场中各点特性的基本物理量,其地位与电场中的电场强度E相当。
这个物理量之所以叫做磁感应强度,而没有叫做磁场强度,是由于历史上磁场强度一词已用来表示另外一个物理量了,区别:磁感应强度反映的是相互作用力,是两个参考点A与B之间的应力关系,而磁场强度是主体单方的量,不管B方有没有参与,这个量是不变的。
1769-NPK18
1769-NPKSDN
1769-OA16
1769-OA8
1769-OB16
1769-OB16P
1769-OB32
1769-OB32T
1769-OB8
1769-OF2
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1769-OF4CI
1769-OF4VI
1769-OF8C
1769-OF8V
1769-OG16
1769-OV16
1769-OV32T
1769-OW16
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