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感应电量q是电磁感应问题中微元法与动量定理综合的最佳切入点之一,在单棒与双棒情境下又成为空间位移的隐蔽条件,即q=(△(?))/R_总=BL/经R_总(恒定磁场情况下x为单棒位移或双棒的相对位移),近几年各地特别是江苏省的压轴大题中都有应用。笔者最近见到运用此推论的两道高三模拟题,发现解答有误,摘录如下:题1如图1所示,水平固定的两根间距L为1 m的平行金属导轨之间接有电动势E为6 V内阻r为1Ω的电源,
Inductive charge q is one of the best entry points for the combination of the micro-element method and the momentum theorem in the problem of electromagnetic induction. It becomes a concealed condition of space displacement in single-rod and double-rod situations, that is q = (Δ (?)) / R _ Total = BL / by R_ total (constant magnetic field x single rod displacement or double rod relative displacement), in recent years, especially in Jiangsu Province, the finale major problems have applications. I recently saw the use of this corollary of the two high school three simulation questions and found that the answer is incorrect, excerpt are as follows: Question 1 As shown in Figure 1, the level of the two fixed parallel spacing L 1 m parallel to the metal track with electromotive force E 6 V internal resistance r is 1Ω power supply,