Which two poles are positive and negative? 60

The 12V positive and negative electrodes are usually colored and symbolically marked. The red wire or red mark is the positive pole, and the one marked with + is the positive pole. The black wire or black mark is the negative electrode, and the one marked with a - is the negative electrode.

If there is no mark, you can use the multimeter 12V or 50V gear, the red and black watch pen briefly touch the 12V output terminal at the same time, and the watch needle indicates a certain voltage value from left to right, indicating that it is just right, the red watch pen is connected to the positive pole of 12V, and the black watch pen is connected to the negative pole of 12V. Assuming that the watch hand is reversed, it means that the red watch pen is in contact with the negative pole, and the black watch pen is in contact with the positive pole.

If there is no multimeter, it can be distinguished by a 12V LED diode, or a single LED diode, in series with a resistor of about 1K. Similarly, if you make a brief contact with the 12V electrodes, it can be lit, indicating that the positive electrode of the LED diode is connected to the positive electrode of 12V, and the negative electrode is connected to the negative electrode. If it can't be lit, it means that it is reversed, and if it can be lit, it means that it is positive, and the negative sister is negative.

As long as you know the polarity of the light-emitting diode, you know the positive and negative polarity of 12V.

Identify LED polarity. A new package with long pins positive and short pins negative.

Only the red one in the data cable is the power supply line.

Those two are positive and negative poles, which represent review and review.

There will be a "+" sign on the battery, the "+ sign is the positive pole", and the "- sign is the negative pole".

Red is positive, blue is negative, or vice versa.

Arctic and Antarctic. Someone who didn't come downstairs.

Red is positive, gray is negative, and green and white are two data transmission lines.

Are you going to use this with just two of them? Impossible.

Under the conditions specified in the design (e.g., temperature, discharge rate, termination voltage, etc.), the minimum capacity that a battery should be able to discharge, measured in amperes per hour, is denoted by the symbol C. The capacity is greatly affected by the discharge rate, so the discharge rate is often marked with Arabic numerals in the lower right corner of the letter c, such as c20=50, indicating that the capacity at the rate of 20 is 50 ampere·h.

The theoretical capacity of the battery can be accurately calculated from the amount of electrode active material used in the battery reaction formula and the electrochemical equivalent of the active material calculated according to Faraday's law. Due to the side reactions that can occur in the battery and the special needs of the design, the actual capacity of the battery is often lower than the theoretical capacity.

The actual operating voltage of the battery is equal to the difference between the equilibrium electrode potentials of the positive and negative electrodes under different use conditions. It is only related to the type of active material of the electrode, not the amount of active material.

Summary. In the circuit diagram, one long and one short is the positive and negative poles of the power supply, the positive pole is a longer vertical bar, and the negative pole is a shorter vertical bar, and the switch is generally connected to the power supply.

The function of the power supply is to move two charges (positive and negative) to both sides of the power supply (positive and negative), and the positive and negative poles of the power supply are due to the potential difference, or the existence of voltage. A high electric potential is called the positive electrode, and the current flows from a high electric potential to a low electric potential, that is, from the positive electrode. The electric potential is due to the electric field.

Along the direction of the electric field, the electric potential decreases, and in the direction of the electric field, the electric potential increases.

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How to divide the positive and negative poles in the circuit diagram? Which side is positive and which side is negative?

In the circuit diagram, one long and one short is the positive and negative poles of the power supply, the positive pole is a longer vertical bar, and the negative pole is a shorter vertical bar, and the switch is generally connected to the power supply. The function of the power supply is to move two kinds of charges (positive and negative) to both sides of the power supply (positive and negative), and the positive and negative poles of the power supply are due to the potential difference in the hall, or the existence of voltage. The high electric potential is called the positive electrode, and the current flows from the high electric potential to the direction of the low electric potential, that is, the Song silver mu flows out of the positive electrode.

The electric potential is due to the electric field. Along the direction of the electric field, the electric potential decreases, and in the direction of the electric field, the Nomori electric potential increases. Friend, if it helps you, please give a thumbs up, thank you.

l positive stage, n negative electrode.

Alternating current is not divided into positive and negative poles, only zero, phase line. Direct current can distinguish positive and negative poles according to the direction and symbol of the current. Extended Resources:

1.In galvanic batteries, the device is the power supply, and the electrode from which the current flows out has a high potential, which is the positive electrode, and the electrode plays a reducing role, that is, ions or molecules get electrons; In the electrolytic cell, the device is an electrical appliance, subject to the connected power supply, and the electrode connected to the positive electrode of the power supply plays an oxidation effect, that is, ions or molecules lose electrons, which is different from galvanic batteries. 2.

The negative electrode is the lower end of the power supply (potential). In galvanic cells, it refers to the electrodes that act as oxidation, and the battery reaction is written on the left. In an electrolytic cell, it refers to the electrode that acts as a reducer, as distinguished from a galvanic cell.

From a physical point of view, it is the pole where electrons flow out of the circuit. 3.A component in an electronic or electrical device, a piece of equipment used as the two ends of an input or output current in a conductive medium (solid, gas, vacuum, or electrolyte solution).

The one pole that inputs the current is called the anode or positive pole, and the one pole that emits the current is called the cathode or negative pole. There are various types of electrodes, such as cathode, anode, welding electrode, electric furnace electrode, etc. 4.

In batteries, the electrode generally refers to the location where the redox reaction with the electrolyte solution takes place. The electrode is divided into positive and negative, generally the positive electrode is the cathode, which gains electrons and undergoes a reduction reaction, while the negative electrode is the anode, which loses electrons and undergoes oxidation reaction. The electrode can be metallic or non-metallic, and it becomes an electrode as long as it can exchange electrons with the electrolyte solution.

5.The concept of the electrode is mFaraday proposed it in 1834 after conducting experiments on system electrolysis, and originally referred only to the metal rods inserted in the electrofluid that make up the battery.

The component of a battery, which consists of a series of phases in contact with each other, one end of which is an electronic conductor metal (including graphite) or semiconductor, and the other end must be an ionic conductor electrolyte (here specifically refers to the electrolyte solution, referred to as "electrolyte" or "electro-hydraulic"). The electrode with the simplest structure should include two phases and a phase interface, i.e., metal|Electrohydraulics . The electrodes defined above are also called "half-cells".

1. We can distinguish according to the specific different signs of the positive and negative poles. - In general, the signs of the positive and negative poles of direct current have significant characteristics, the signs of the positive electrode are more prominent, and the signs of the negative electrodes are generally relatively flat, and the two are very easy to distinguish. 2. We can also distinguish according to the specific color.

In daily tasks, the positive electrode of - direct current is marked with red, while the negative electrode is generally marked with black, so we just need to remember that the red electrode is the positive electrode and the black electrode is the negative electrode, and we can distinguish it.

3. If we encounter the positive and negative poles with the same color that the logo is not clear, we need to distinguish them by the difference in the deflection of the DC pointer. We connect the DC meter to the specified positive and negative poles. , when you see the direction of the pointer of the DC meter, that is the positive pole, and the rest is the negative pole.

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The two signal lines are not divided into positive and negative poles (it is forbidden to short connect the two signal wires, although the wiring is not divided into positive and negative poles, but it cannot be directly short-circuited). As long as it is in the same circuit, the signal line can be connected at will, and the tree network can be connected. The installation of typical smoke and temperature sensing fire detectors should meet the following requirements:

1. The horizontal distance from the detector to the wall and beam edge should not be less than;

2. There should be no obstruction within the horizontal distance around the detector;

3. The horizontal distance from the detector to the nearest side of the air supply outlet of the air conditioner should not be less than; The horizontal distance to the orifice of the porous air supply roof should not be less than;

4. When the detector is installed on the roof of the inner walkway with a width of less than 3m, it should be installed in livable. The installation distance of point-type temperature sensing fire detectors should not exceed 10m; The installation distance of point-type smoke fire detectors should not exceed 15m. The distance from the detector to the end wall should not be greater than half of the installation spacing;

5. The detector should be installed horizontally, and when it is really necessary to install it at an angle, the tilt angle should not be greater than 45°.

The smoke detector (referred to as the smoke detector) adopts a dual-source and dual-ionization chamber structure, which can automatically track the drift of the working point caused by environmental changes, detect the aging of the smoke detector due to dust accumulation, ensure that its alarm sensitivity is in a stable state, and effectively carry out fire alarm and fault alarm. The probe consists of a detection ionization chamber and a reference ionization chamber, and when foreign smoke (smoke particles) enter the measurement chamber, the ionization magnetic rays change (the current change is converted into a voltage change, which is monitored by the electronic system, and when the value exceeds the specified threshold), an alarm signal is output.