Sophomore Physics Formulas from mechanical vibration to magnetic fields in seven chapters

The sophomore physics major.

Come and learn from the mechanical vibration.

Conservation of kinetic energy, mechanical waves, molecular thermal motion, gases, electricity.

DU field, constant current zhi, magnetic field, electromagnetic DAO induction, alternating current, electromagnetic field, and electromagnetic wave.

1. Mechanical vibration refers to the regular reciprocating motion of an object or particle near its equilibrium position. The strength of the vibration is measured by the amount of vibration, which can be the displacement, velocity, or acceleration of the vibrating body.

2. The phenomenon of electromagnetic induction refers to the fact that a conductor placed in a changing magnetic flux will produce an electromotive force. This electromotive force is called induced electromotive force or induced electromotive force, and if this conductor is closed into a loop, the electron force will drive the flow of electrons, forming an induced current (induced current).

3. The basic properties of the electric field: the electric field has a strong effect on the charge placed in it; This force is called the electric field force; Electric field strength: The ratio of the electric field force f to the amount of charge q at a point placed in the electric field is called the electric field strength of the point;

4. Electric potential: the electric potential of a certain point in the electric field is equal to the work done by the electric field force when the unit positive charge moves from that point to the zero electric potential point; It is relative, and related to the selection of the zero potential surface; The electric potential is a scalar quantity and the unit is volts v.

5. The relationship between the electric field strength and the electric potential difference: in a uniform electric field, the electric potential difference between two points along the direction of the field strength is equal to the product of the field strength and the distance between these two points. Mathematical expression: u=ed; This formula only applies to uniform electric fields.

Elective 3-1 (Electrostatic Field, Constant Current, Magnetic Field).

Elective 3-2 (Electromagnetic Induction Alternating Current Sensor).

Then choose one of 3-3 3-4 3-5.

Then I reviewed it in the third year of high school.

The days are fast.

Chapter 9 Mechanical Vibration Copying.

Chapter 10 Mechanical Waves.

Chapter 11 Molecular Thermal Motion Conservation of energy.

Chapter 13 Gases.

Chapter 14 Electric Field.

Chapter 15 Constant Current.

Chapter 16 Magnetic Fields.

Chapter 17 Electromagnetic Induction.

Chapter 18 Alternating Currents.

Chapter 19 Electromagnetic Fields and Electromagnetic Waves.

In fact, physics is not just a theory and formula, nor is it a question on the test paper, physics is all around you. I recommend "Grimace Physics Lesson", ** penmanship to write the history of physics, very interesting.

Electricity, magnetism, thermal, optics, electrostatic fields, conservation of momentum (very important), and many more.

In the first semester, students will take compulsory 2, and in the next semester, they will take elective courses 3-1 and 3-2

v5 on the first floor, it is recommended that you tidy up the questions yourself.

You don't need so many formulas, you have to decide what you need according to your needs. On the first floor, even the electives are listed, and they are tough.

Physical theorems, laws, tables of formulas.

Try to write down a pair of relevant or unrelated formulas on a piece of paper, and one by one you will get the formula you want, and you can get some formulas that are good but not listed by the teacher. That's how I learned physics in high school.

Read the book once, and then try to push it yourself without reading the book. In this way, these formulas can be flexibly integrated into your brain, and it is easy to associate the formula process with the test test.

One, two can also help you, so much how to help! Read a book or ask a classmate.

Go to the book by yourself, and if you have time to ask questions here, you might as well read a few pages of the book.

It has to be understood, so that it can be remembered, and it will be used.