【People's Education Press】High School Physics Elective Compulsory Volume 2
This course is based on the compulsory advanced high school physics textbook, covering advanced knowledge in electromagnetism, including Ampere force, Lorentz force, electromagnetic induction, alternating current, and sensors—core physical concepts and principles.
Course Overview
📚 Content Summary
This course is based on the compulsory elective high school physics curriculum, covering advanced electromagnetism topics including Ampere force, Lorentz force, electromagnetic induction, alternating current, and sensors—core physical concepts and laws.
Delve into the mysteries of electromagnetism and master fundamental principles of high school physics.
Author: People's Education Press Curriculum Textbook Research Institute Physics Curriculum Textbook Research and Development Center
Acknowledgments: Approved by the National Textbook Committee Expert Committee (2019)
🎯 Learning Objectives
- Accurately apply the left-hand rule to determine the direction of Ampere force and Lorentz force, and understand the special case of force direction for negative charges.
- Master the formula for calculating the magnitude of Lorentz force, and independently derive the formulas for radius and period of circular motion of charged particles in a uniform magnetic field.
- Analyze and explain the working principles of mass spectrometers, cyclotrons, velocity selectors, and magnetohydrodynamic generators.
- Accurately state the content of Lenz’s Law and Faraday’s Law of Electromagnetic Induction, and use the right-hand rule to determine the direction of induced current when cutting magnetic field lines.
- Flexibly apply the formulas E = n \frac{\Delta \Phi}{\Delta t} and E = Blv \sin \theta to calculate induced electromotive force in various physical scenarios.
- Analyze complex electromagnetic phenomena such as self-inductance, eddy currents, and electromagnetic damping from the perspective of energy conversion, and solve related practical physics problems.
- Analyze the process by which a coil rotating in a magnetic field generates alternating current, skillfully write instantaneous value expressions, and perform conversions between peak and root mean square (RMS) values.
- Understand the basic principles of ideal transformers, and use the proportional relationship between voltage and number of turns to solve circuit problems.
- Comprehend the mechanism of power loss in long-distance power transmission, calculate voltage drop and power loss in transmission lines, and explain the economic advantages of high-voltage transmission.
- Describe the periodic changes in charge, current, electric field energy, and magnetic field energy in an LC oscillating circuit.
Lessons 共 5 课时 · 预计 15.0h
Lessons
Lesson
本课程探讨了磁场对电流与电荷的作用，通过宏观的安培力与微观的洛伦兹力，揭示了从电流产生到带电粒子运动的物理本质。学习重点在于掌握左手定则的进阶应用、理解洛伦兹力对电荷不做功的特性，以及运用动力学规律分析带电粒子在磁场中的圆周运动。
This lesson explores the principles of electromagnetic induction, focusing on Lenz’s Law, the phenomenon of electromagnetic damping, and the practical application of the right-hand rule. Students will learn how to analyze induced current direction and magnitude, understand the energy transformations involved in these processes, and apply these concepts to real-world technologies like generators and electromagnetic relays.
本课程介绍了交变电流（AC）的产生原理，重点解析了线圈在匀强磁场中旋转时，磁通量与感应电动势随“中性面”位置变化的物理规律。通过学习发电机结构、频率与周期的关系以及正弦式电动势的数学推导，学生能够掌握交流电瞬时值的计算方法及其在实际电力系统中的应用。
This lesson explores the physics of LC oscillating circuits, focusing on the periodic conversion between electric field energy in capacitors and magnetic field energy in inductors. Students will learn to analyze the phase relationships between charge and current, understand the role of self-induction as electromagnetic inertia, and examine how Maxwell’s theory of mutually inducing fields enables the generation of electromagnetic waves.
本课程介绍了传感器的基本定义与双重结构，重点探讨了干簧管、光敏电阻及热敏电阻等半导体元件的工作原理。通过分析电饭锅控温、楼道照明及酒精检测等案例，学习了如何将物理量转化为电信号，并理解了居里点等关键物理特性在自动化控制中的应用。