1问题的提出在讲到选修3-2第一章电磁感应第四节楞次定律之后,学生对一道习题提出了几个问题,题目和问题如下.如图1所示,水平放置的两条光滑轨道上有可自由移动的金属棒PQ、MN,当PQ在外力的作用下运动时,发现MN会在磁场力的作用下向右运动,则PQ所做的运动可能是().A.向右加速运动B.向左加速运动C.向右减速运动D.向左减速运动 PROBLEM PROBLEMS After talking about the Lenz’s Law of Electomagnetic induction and the fourth chapter of Elective 3-2, students put forward a few questions, questions and problems to an exercise as follows: As shown in Figure 1, two horizontal PQ, MN can freely move on the smooth orbit. When PQ moves under the action of external force, it is found that MN moves to the right under the action of the magnetic force. The movement of PQ may be (). Accelerate to the right B. Acceleration to the left C. Decelerate to the right D. Decelerate to the left