When you go to college, some people study easily, while others study for years. This situation is closely related to the difficulty of the subjects in your major. Many candidates believe that the failure rate of the following four university courses is relatively high, and even top student can't guarantee not to fail. If college students major in one or more of the following four courses, it means that college life may not be easy.

electromagnetism

Electromagnetism, as a course of physics, mainly studies the laws of electromagnetic phenomena and the application of electromagnetic phenomena. In a word, electromagnetism discusses the interaction between magnetism and electricity. Electricity and magnetism were originally independent of each other, and later developed into a comprehensive discipline. The subject of electromagnetism also has many knowledge points, including electrostatic field in vacuum, circuit analysis, magnetic medium, AC circuit, electromagnetic wave, electromagnetic compatibility analysis, constant current and so on. It is really difficult to learn deeply and thoroughly. Many students fail every year.

structural mechanics

Structural mechanics, as a branch of solid mechanics, studies the laws of stress and force transfer in engineering structures. This course is a relatively difficult subject for college students. As a college student, we need to know the internal force, displacement and dynamic response, and learn the analysis methods of internal force, displacement and energy method. According to different research objects, structural mechanics can be divided into structural stability theory, structural fatigue theory, dynamic structure, statics and structural fracture. It is so professional and complicated that even scholars can't guarantee that they won't fail.

Circuit analysis

The difficulty of circuit analysis is also well known. The so-called circuit analysis, the main task is to calculate the current I or voltage V of each part of the circuit under a given circuit model. It is dazzling to say that there are many kinds of circuit models. For example, what you usually need to know includes the topology of the circuit, the excitation source, the storage element capacitance C and so on. At the same time, students also need to master the basic laws of circuits, sinusoidal AC circuits, non-sinusoidal periodic current circuits, iron core coil circuits, and so on. In short, it is much more difficult than the college entrance examination. Many candidates would rather take the college entrance examination at the beginning than study circuit analysis.

engineering cybernetics

As a branch of cybernetics, engineering cybernetics mainly expounds the theory of analysis, design and operation of controlled engineering systems. This subject is also quite difficult. In the process of learning, we need to understand linear systems and nonlinear systems, learn Laplace transform method, know how to input, output and transfer functions, know the design principle of ultrasonic filtering, and so on. Many knowledge points make college students complain.