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人教版高中《物理》教科书(必修加选修)第二册第十三章“电场”第146页习题B组第6题,可以说是一道好题,该题可以使学生加深对电场知识的理解,同时可以让学生综合运用力学、运动学、动量及能量等相关知识,并且难度不大。本人对配套“教师教学用书”中的解法提两点建议。原题初速度为2.2×10~5m/s的α粒子沿逆着电场线的方向射入匀强电场中,观察到射入深度为
PEP High School “Physics” Textbook (Compulsory and Optional) Volume 2 Chapter 13 “Electrical Field” on page 146 Problem Set 6 Problem 6 can be said to be a good question, which can make students deepen their knowledge of the electric field. Understanding, while allowing students to use a comprehensive knowledge of mechanics, kinematics, momentum and energy, and difficult. I propose two suggestions for the solution to the “Teacher’s Teaching Book”. The alpha particles with initial velocity of 2.2×10~5m/s were injected into the uniform electric field against the direction of the electric field line, and the observed depth of penetration was