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一、单杆配电阻和电容问题问题1 如图1所示,两光滑水平放置的平行金属导轨间距为 L,电阻不计,左端串一定值电阻 R,金属杆的电阻为 r,质量为 m,匀强磁场为 B,当杆在恒力 F作用下开始运动,分析以后系统的变化情况:分析 (1)杆在拉力 F作用下,开始运动后,由于导体做切割磁感线运动,在回路系统中产生感应电流,使杆同时还受到安培力的
A single pole with resistance and capacitance problems Problem 1 As shown in Figure 1, the two smooth horizontal parallel metal rails placed spacing L, regardless of the resistance, the left end of a certain value of resistance R, metal rod resistance r, mass m, Uniform magnetic field B, when the rod began to exercise under the action of constant force F, the analysis of future changes in the system: Analysis (1) rod under the action of tension F, after the start of movement, due to the conductor to do cutting magnetic induction line movement in the circuit Induced current in the system, so that the rod is also subject to ampere force