Chapter 28 Inductance and Electromagnetic Oscillations Then the coefficient is defined as the self-Inductance NΦ L= A coil that has significant self- inductance l is called an inductor Its si unit: henry(亨利)=1H=1Tm2/A related to the geometry of the coils and magnetic medium.自感系数与线圈的大小、形状、 磁介质、线圈密度有关,而与线圈中电流无关。Chapter 28 Inductance and Electromagnetic Oscillations I N L  = Then the coefficient L is defined as the Self-Inductance. A coil that has significant self￾inductance L is called an inductor. It related to the geometry of the coils and magnetic medium. 自感系数与线圈的大小、形状、 磁介质、线圈密度有关，而与线圈中电流无关。 1 henry (亨利) = 1 H = 1T.m2 Its SI unit: /A