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不少物理习题的解并非唯一的,可能有两个或多个解。但是在学生的作业和试卷中,却常常发现这类习题的漏解现象,这在物理教学中是必须引起重视的一个问题。下面将通过例题加以剖析。一、因思维单调而产生的漏解[例1]如图1所示,有一摆长为 l 的单摆,摆球质量为 m、带电量为+q,将其置于磁感应强度为 B(方向垂直纸面向里的匀强磁场中)。现把摆球沿纸面向左拉直摆线至水平位置后释放,
The solution to many physical problems is not unique. There may be two or more solutions. However, in the students’ assignments and test papers, it is often found that the leakage of such exercises is a problem that must be paid attention to in physics teaching. The following will be analyzed through examples. First, due to the monotony of thinking of the leakage solution [Example 1] as shown in Figure 1, there is a pendulum length l single pendulum, pendulum mass is m, the charge is +q, will be placed in the magnetic induction intensity of B ( The vertical paper faces inward in a uniform magnetic field). The pendulum ball is released by pulling the ball straight to the left along the horizontal plane.