摘要
用毕奥-萨伐尔定律计算一段直线电流的磁场时,因为积分变量的选取不同,产生了两种不同的表达式,在对积分变量的取值范围作了分析与比较后,更新了有关教材中的表述方式。
When the Biot-Savart Law is used to compute the magnetic field of a linear current, the different choice of the integral variables will give rise to two different expressions. The author makes an analysis and comparison of the value ranges of integral variables and updates some expressions in some textbooks.
