Why are there only two vertical lines drawn on the two batteries in the book, one long and one short

The two batteries in the book only draw two vertical lines, one long and one short, which is a way to represent the battery when learning the top stream in the physics textbook in the physics book.

The battery symbol drawn on the book does not represent a few batteries, but represents this thing, the voltage of the battery can be marked on both sides, so no matter how many batteries there are, as long as the electricity is correct, it is just a drawing symbol.

The national standard for battery symbols is not something that can be drawn casually.

Look at the standard GB t first symbol.

Today's textbooks have simplified how to draw a battery pack. Regardless of how many batteries are made up of a battery pack, it is represented by two vertical lines, one long and one short.

This is the indication of the positive and negative poles of the battery. And that's what physics says.

For this to happen, this is a symbol drawn in the circuit. Generally, the long line represents the positive pole, and ** represents the negative pole of the battery.

Simple drawing method, how many batteries can be drawn only one long and one short to represent the battery pack.

This general distinction is between one positive pole and one negative pole, so it is easier to understand and see one long and one short.

In the circuit, the symbol of the battery is represented by vertical bars of different lengths, and the long line indicates the positive pole of the battery!.

The two batteries in the book only draw two vertical lines, one long and one short, and this vertical line is a symbol representing the battery.

The two batteries only draw two vertical lines, one long and one short, which is a representative symbol.

, and then divide the mass by the molar mass to obtain the number of moles of water, and because 2H2+O2=2H2O, 2mol of water is generated to transfer 4mol of electrons, and n can be obtained

The battery capacity is measured by voltage and ampere-hours, so 12V75A is actually 12V75Ah. It's the same for both.

ah is the unit of battery capacity, and a should be the unit of current. The two should be the same, it is possible that the first letter after the h letter has been lost.

1) Glucose and oxygen galvanic acid conditions.

c6h12o6 + 6h2o - 24e- =6co2 + 24h+

6O2 + 24H+ +24E- =12H2O2) glucose and oxygen primary cell alkali conditions.

c6h12o6 + 36oh- -24e- =6co3^2- +24h2o

6o2 + 12h2o + 24e- =24oh+

Not bad. Mr. Liu Jiang is a fuel cell maker, and he is a very good teacher.

Fuel cells have a bright future, but it is also difficult to see the germination from commercial applications. It is more practical to study this major as a teacher.

If you're interested in it, you can't help it

Electrochemistry itself can't answer.

Professor Tang Yong is in charge of the fuel cell project of Huagong, you can call 02087114634 to find out.

Fuel cells are not easy to find a job, be cautious.

Yes, the cooperation unit of Yanan Group - South China University of Technology.

One of the earliest units to carry out fuel cell research in China;

In 2009, the world's largest proton exchange membrane fuel cell power station was built, and a number of key fuel cell technologies are at the international advanced level.

It has established the "Guangdong Provincial Key Laboratory of Fuel Cell Technology" and a 2,500-square-meter research and development base in Nansha Economic and Technological Development Zone, Guangzhou.