【摘要】 本文对[1]中的关系式Fδx=δx给出了证明,并且指出在使用(?)=I(?)φ_m时,φ_m是有正、负的而不是绝对值,因此,闭合载流回路在外磁场中受力的方向是磁通增加的方向,但不一定是磁场增强的方向。更多还原

【Abstract】 In this paper, a proof is given to the equation, F_xδx =δW, in the reference 1. When equation, =I∨φ_m, is used, the φ_m is not an absolute value but has an either positive or negative sign. Thas the direction of the force acting on a current-carrying closed loop in an ex-ternal B-field is the direction in which the magnetic flux is increased, but in which B-field may not be strengthened.更多还原