The symbol for a battery in physics consists of two lines of different lengths.
The long line represents the positive electrode of the battery, and the short line represents the negative electrode of the battery, as shown in the figure below:
It is suitable Note that sometimes there are two sets of different lengths. In the case where lines are formed, this represents two batteries connected in series, as shown in the figure below:
When there are multiple points on two sets of lines of different lengths. lengths, this represents a battery, as shown in the figure below:
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Information detailed:
Common batteries
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Dry batteries are also called manganese-zinc batteries. So-called dry batteries are related to voltaic batteries, what are called manganese-zinc batteries frefer to their raw materials. For dry cell batteries made from other materials such as silver oxide batteries and nickel cadmium batteries. The manganese-zinc battery voltage is 15V. Dry batteries consume chemical raw materials to generate electrical energy. Its voltage is not high and the direct current it can produce cannot exceed 1 ampere.
2. Lead acid battery
The battery is one of the most used batteries. Use a glass or plastic tank, fill it with sulfuric acid, and insert two lead plates, one is connected to the positive electrode of the charger and the other is connected to the negative electrode of the charger. , a battery is formed.
3. Lithium battery
Battery with lithium as negative electrode. It is a new type of high-energy battery developed after the 1960s.
Can be used in aluminum batteriesaluminum of cell phones. The symbols of the metal elements in this battery are
How to distinguish positive and negative poles. symbols of power:
1. The difference between positive and negative poles:In the circuit diagram, a long line and a short line represent the positive and negative poles: of the power supply. The long line represents the positive electrode and the short line represents the negative electrode.
2. Distinguish between the positive and negative poles of the battery: Batteries generally exist in groups. The positive and negative poles have terminals colored red for the positive pole and blue. or black indicates positive and negative pole. The second is to express it with symbols.
3. Lithium batteries have obvious differences: Lithium batteries such as multimeters use 9V batteries.convex part is the positive electrode and the recessed part is the negative electrode.
4. Distinguish the positive and negative electrodes of dry batteries: Like lithium batteries, the convex electrode is the positive electrode and the flat electrode is the negative electrode, which are usually marked. The positive and negative terminals will be as shown in Figure 2.
5. Connecting wire:The power connecting wire should also distinguish between positive and negative poles, that is, look at the wire color, red polarity, black negative pole. , connect in order, alternately. The current is not divided into positive and negative poles, only phase lines. According to the direction of current flow, direct current can be divided intoDivide into positive and negative poles. Direct current can differentiate positive and negative poles according to the direction of flow of courant.
In the power symbol, a circle represents the power supply, which is usually marked with a positive and negative sign (or only a + sign) to indicate the positive pole. If there are two wires, long and short, this represents the power supply and the long wire is the positive pole. If the polarity of the power supply is represented by a symbol, such as Uab, Ubc, etc., the first letter of the index is the positive pole.
The symbol for the element lithium is: Li. The element has the word "钅" next to it. It is a metallic element. The number of electrons outside the core is 3. The number of electrons in the outermost shell is 1. , less than 4, easy to lose. The valence of lithium is +1. Since the relative atomic mass of lithium is small, the volume and mass of the lithium battery are small.
So the answer is: Li, metal, 3, +1, small mass.