Electricity and heat, these topics need you to understand what they say. Generally, high schools can't go deep, even in competitions. However, you should understand the required concepts accurately, not only accurately, but also require the knowledge connection between points to form a network knowledge structure, so that you can face the topic calmly. The college entrance examination, these questions can not be wrong, to respond quickly! Electricity, including point charge, electric field, potential and its properties in electrostatics, calculation (scalar calculation of potential, electric field vector calculation), circuit analysis and so on.
For optics and modern physics, it is a conceptual problem with a deep concept, and many things do not need to be studied in detail. You can do several typical questions, and the questions you come up with are not difficult.
If it has something to do with mechanics, it will be troublesome, and this is where the problem comes from. So it is good to talk about the concept of electricity, but you can't do the problem well, and often the calculation problem is wrong, that is, you didn't learn the mechanics part well. I can't go back to practice stress analysis, motion analysis and combining the concepts of electricity and heat. This kind of questions remember that the concepts of electricity and heat are just a form, and the essence is mechanical kinematics analysis.
Recommended methods for learning electricity:
First of all, you should preview and understand basic concepts, such as the meaning of current, especially the circuit diagram.
Listen carefully in class, especially when the teacher is doing experiments. You should study hard. You can also borrow experimental instruments from teachers after class to enhance your hands-on ability.
Do more exercises. Although we don't advocate sea tactics, we should practice more scientifically, so as to be more flexible. Remember, preview and summary are very important. Do your own questions after preview, and then summarize some methods.
As long as you have been preparing well, it is not so difficult to summarize frequently. You'd better be one or two courses ahead of the teacher.