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问题引入(人教版物理选修3-2第四章第五节P_(21)课后习题3)设图1中的磁感应强度B=1 T,平行导轨宽l=1m,金属棒PQ以1m/s速度紧贴着导轨向右运动,R=1Ω,其他电阻不计.(1)运动的导线会产生感应电动势,相当电源.用电池等符号画出这个装置的等效电路图.(2)通过电阻R的电流方向如何?大小等于多少?解析(1)画好等效电路.金属棒PQ向右运动切割磁感线产生感应电动势,
The introduction of the problem (PEP Physics Elective 3-2 fourth chapter fifth P_ (21) after-school exercise 3) Figure 1 in the magnetic induction B = 1 T, parallel rail width l = 1m, metal rod PQ to 1m / s The speed is close to the rail to the right, R = 1Ω, excluding the other resistance. (1) The moving wire will produce induced electromotive force, quite power supply. Draw the equivalent circuit diagram of this device with the symbol of battery. Resistor R current direction? Size is equal to how much? Analysis (1) Draw a good equivalent circuit. PQ metal rod cutting right magnetic induction lines induced magnetic force,