What does hot mean in electrical professions

hot in electrical majors.

It can be expressed as a live wire, and if it does not appear near the wiring, it means that it is hot in the ordinary sense.

FireWire usually uses Live Wire, abbreviated as L.

Fireline:The power cord that feeds power in the circuit. For mains, it refers to a wire with a high voltage to the ground. In DC circuits, it refers to a wire that connects to the positive pole.

Zero line:The neutral line is the neutral point on the secondary side of the transformer.

Leads out of the line, with the phase line.

Normally, the neutral line is repeatedly grounded with the ground wire at the neutral point on the secondary side of the transformer.

It plays a double role of protection.

Ground:It is not used for working circuits, only as protective wires. Using the absolute "0" voltage of the earth, when the leakage of the device housing occurs, the current will quickly flow into the ground, even if a PE line occurs.

If there is an open path, it will also flow into the ground from a nearby grounding body.

Voltage difference. The voltage is the potential difference between two points.

With voltage, the charge flows through the wire to form an electric current. It's the same as the principle that water flows from high to low. Water does work in the process of flowing, and electricity does work in the process of flowing.

When an electric current passes through a wire with a thin wire diameter and high resistance, a traffic jam may occur, resulting in heat generation.

The tungsten filament of electric lamps can withstand high temperatures, and the tungsten filament emits light when it is hot.

Alternating current. The AC power cord is divided into a neutral line (the letter of the symbol is"n"neutral wire) and Firewire (marked with the letters"l"live wire）。There is also a ground wire connected to the electrical appliance - a wire connected to the earth; The live wire, neutral wire, and ground wire are all wires connected to a three-prong socket, and the voltage difference between the live wire and the neutral wire is maintained in a sinusoidal oscillating pattern.

Since the ground and neutral potentials are the same, the voltage difference between the live and ground wires also remains sinusoidal oscillations. When the human body touches the live wire, the current of the live wire flows through the human body into the earth or the neutral line, and an electric shock accident will occur, while the contact neutral wire will not be shocked. If the shell of an electrical appliance with a conductive shell is connected to the ground wire, in the case of leakage, the current will flow directly through the ground wire to the earth without passing through the body, thus avoiding electric shock accidents.

hot means that there is electricity in the circuit diagram, which means that the electrical equipment is energized and heated.

hot.

Bilingual. Dictionary Results:

hot [English] [h t] [American] [hɑ:t].

adj.hot; spicy; excited; Popular;

vt.To excite, to excite;

adv.hot; Pressing;

vi.Getting hot;

Third person singular: hots past participle.

Hotted Superlative: Hottest is now in the ongoing tense.

hottingcomparative: hotter past tense.

Hysteresis:

The phenomenon of hysteresis is referred to as hysteresis. When the ferromagnet is magnetized to a saturated state, if the magnetic field strength (h) is gradually reduced from the maximum value, the magnetic induction intensity (symbol b) does not return from the original path, but decreases along a curve slightly higher than the original path, when h=0, b is not equal to zero, that is, the change of b in the magnetic body lags behind the change of h, this phenomenon is called hysteresis phenomenon.

Magnetic substances have a tendency to retain their magnetic properties, and the change of magnetic induction intensity b always lags behind the change of magnetic field strength h, which is the phenomenon of hysteresis.

According to the different hysteresis loops, magnetic substances can be divided into three types: hard magnetic substances, soft magnetic substances and moment magnetic substances.

The phenomenon of hysteresis is widely recognized in ferromagnetic materials. When an applied magnetic field is applied to a ferromagnetic substance, the dipoles of its atoms are arranged on their own according to the applied field. Even when the field was evacuated, the partial arrangement remained.

The material is magnetized, and its magnetic properties are retained. When degaussing is required, a magnetic field in the opposite direction is applied.

hysteresis

n.lag (phenomenon); Hysteresis.

hysteresis coupling hysteresis loss hysteresis loss.

hysteresis motor.

In electrical engineering, SCE means that the ceiling is laid inside, and metal pipes should be worn. Laying refers to the installation of conduit or cable from one place to another.

In electrical engineering, SCE means laying in the ceiling. This is one of the commonly used wiring methods in electrical design and construction drawings, which refers to the installation of conduits or cables from one place to another.

In electrical engineering, SCE is one of the commonly used wiring methods in electrical design and construction drawings, which means that the metal pipe should be worn in the ceiling.

Laying refers to the installation of conduit or cable from one place to another.

In electrical engineering, SCE, that is, laying in the ceiling, should wear metal pipes. Laying refers to the installation of conduit or cable from one place to another.

Commonly used wiring methods in electrical design and construction drawings:

SR: Laying along the wire duct.

BE: Laying along or across roof trusses.

CLE: Laid along a column or across a column.

WE: Laying along the wall.

CE: Laying along the ceiling or ceiling surface.

ACE: Laid in a ceiling that can enter people.

BC: Dark laying inside the beam.

CLC: Dark laying inside the column.

WC: Concealed laying inside the wall.

CC: Dark laying in the ceiling.

ACC: Concealed in a ceiling where no human can enter.

fc: Concealed laying in the ground.

SCE: Laying in the ceiling, metal pipes should be worn.

SCE: Laying in the ceiling, metal pipes should be worn.

In electrical engineering, SCE, that is, laying electrical lines in the ceiling, should wear metal pipes to meet the requirements of electrical equipment. Laying refers to the installation of conduit or cable from one place to another.

Extended information: 1. Electrical engineering, referred to as EE, is the core discipline and key discipline in the field of modern science and technology. For example, it is the great progress of electronic technology that has promoted the arrival of the information age based on computer networks, and will change the way human life and work and so on.

2. Main courses: Circuit Principle, Analog Electronic Technology, Digital Electronic Technology, Microcomputer Principles and Applications, Signals and Systems, Automatic Control Principles, Motors and Traction, Power Electronics Technology, Electric Power Drag Automatic Control System, Electrical Control Technology and PLC Application, Microcomputer Control Technology, Power System Analysis, Power Plant Electrical Part, Electrical Engineering, Power System Automatic Device Principle, Electrical Engineering, High Voltage and Insulation Technology, English for Electrical Engineering, Power System Steady-State Analysis, Power System Transient Analysis, High-voltage technology, high-voltage direct current transmission technology, relay protection.

3. Commonly used wiring methods in electrical design and construction drawings:

SR: Laying along the wire duct.

BE: Laying along or across roof trusses.

CLE: Laid along a column or across a column.

WE: Laying along the wall.

CE: Laying along the ceiling or ceiling surface.

ACE: Laid in a ceiling that can enter people.

BC: Dark laying inside the beam.

CLC: Dark laying inside the column.

WC: Concealed laying inside the wall.

CC: Dark laying in the ceiling.

ACC: Concealed in a ceiling where no human can enter.

fc: Concealed laying in the ground.

SCE: Laying in the ceiling, metal pipes should be worn.

Residual Current Device (RCD): Under normal working conditions, the load is switched on and the current is disconnected; And when the residual current of the circuit reaches its specified value under the specified conditions, it causes the contact action and disconnects the main circuit as a protector. A residual current device may be a combination of various components that sense residual current and turn on and off the main circuit current.

Residual Current Device (RCD) is a leakage protection device. Leakage protection device is a kind of low-voltage safety protection electrical appliance, and its functions are:

1. It is used to prevent single-phase electric shock accidents caused by leakage;

2. It is used to prevent fire and equipment burning accidents caused by leakage;

3. It is used to detect and cut off all kinds of one-phase grounding faults;

4. Some leakage protection devices can also be used for overload, overvoltage, undervoltage and phase loss protection.

RCD is called "residual leakage action protector" in building electrical, and one of the miniature circuit breakers, commonly known as "leakage protection".

There are two types of master's degrees in electrical engineering, academic and professional.

1. A secondary and professional degree generally refers to a postgraduate education degree with specialized occupational requirements, which is different from an academic degree that focuses on theory and research, and mainly cultivates senior professionals with specific professional backgrounds.

2. At present, China mainly sets up professional degrees at the master's level, and has been approved to hold professional master's degree education in 39 disciplines such as business administration, public administration, education, law, etc., and the scope of students recruited in 2009 has been extended to fresh undergraduate graduates.

3. Traditional electrical engineering is defined as the sum total of the disciplines used to create and produce electrical and electronic systems. This definition is already very broad, but with the rapid development of science and technology, the concept of electrical engineering in the 21st century has gone far beyond the scope of the above definition, and the professor of Stanford University pointed out that today's electrical engineering covers almost all engineering actions related to electronics and photons.

Professional degree. Generally speaking, it refers to a postgraduate education degree with specialized occupational requirements, which is different from an academic degree that focuses on theory and research, and mainly cultivates high-level professionals with specific professional backgrounds. At present, professional degrees are mainly set up at the master's level in China, and professional master's degree education has been held in 37 disciplines such as business administration, public administration, education, and law with approval.

PS: My classmate graduated from the first professional degree of our school, and the job search is the same as ours, so it doesn't matter.

As for what school you said you will go to, it depends on your own strength, and you haven't said anything about your own situation, so I can't recommend it.

Exam introduction comes.

Electrical Engineer Source.

It refers to the professional and technical personnel who have obtained the "Registration Certificate of Registered Electrical Engineer Practice Qualification of the People's Republic of China" and are engaged in electrical professional engineering design and related business.

The State implements a professional qualification registration management system for professional and technical personnel engaged in electrical professional engineering design activities.

Registered electrical engineers have a wide range of practice and can be engaged in electrical supervision, bidding, bid evaluation, technical consultation and other work. According to China's agreement when joining the WTO, it belongs to the service industry should also be open to the world, during the protection period of foreign design companies in the country can only do the plan, expansion, construction drawing design must be undertaken by the domestic design unit or cooperate with the domestic design unit, in 2006 the design market will be fully opened to the outside world, foreign design companies will enter the domestic market.

In order to cope with the challenges of foreign companies entering China, it is imperative to implement a registration system in the field of design, which mainly acts as a technical barrier.

The electrical knowledge com stands for serial communication port. The COM port on the microcomputer is mostly 9 pins, and the maximum rate is 115200bps.

It is usually used to connect a mouse (serial port) and communication devices (such as connecting an external modem for data communication). However, at present, mainstream motherboards generally only have 1 serial port, or even no serial port.

Electrical is a general term for the production, transmission, distribution, and use of electrical energy, as well as electrical equipment manufacturing and other disciplines or engineering fields. It is a science that uses electrical energy, electrical equipment and electrical technology as a means to create, maintain and improve a limited space and environment.

The common end is the positive and negative voltage of the fire zero line.

or computer.

or common.

In general, this is the case.

You should be talking about the com port