Physics problems in grade three, the question in this chapter "What is electricity?"

Electricity is a natural phenomenon. Electricity is a property that produces repulsion and attraction between subatomic particles such as electrons and protons. It is one of the four basic interactions in nature. There are two kinds of electricity or charges: we call one positive and the other negative. Through experiments, we found that charged objects repel each other when the polarity is the same, attract each other when the polarity is opposite, and the attraction or repulsion obeys Coulomb's law.

The glass rod rubbed by silk is positively charged, while the rubber rod rubbed by fur is negatively charged.

The unit of charge in the international system of units is coulomb. 1 coulomb = 1 ampere-second

If the conductor carries a steady current of 1 amp, the amount of electricity passing through the conductor cross-sectional area in 1 sec is 1 coulomb.

Coulomb is not an international standard unit, but an international standard derivative unit. 1 coulomb = 1 ampere-second. The negative charge of an electron is e = 1 .6021892×10/9 coulomb, which means that1coulomb is equivalent to 6.24146×10.

Basic concepts of electricity

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(A) the electric field of charge

Objects that lose or gain electrons have positive or negative charges, and objects with charges are called charged bodies. There is an electric field around the charge, and the charge introduced into the electric field will be affected by the electric field force.

Electric field strength and electric potential are two basic physical quantities that characterize the properties of each point in electrostatic field. The electric field strength at a certain point in the electric field is the force acting on the unit positive charge at that point. The unit of electric field intensity is Newton/Coulomb (n/c >; O) The potential at a certain point in the electric field refers to the work done by the electric field force to move the unit positive charge from that point to the potential reference point in the electric field. The common unit of potential is volt (V) or millivolt (mV), that is, the potential difference between two points in the electric field of 1V= 1000mVe is called the voltage or voltage drop between these two points. The unit of voltage is the same as the unit of potential.

(2) Current and circuit

Under the action of power supply, charged particles will move directionally, with positive charges moving towards the negative pole of power supply and negative charges moving towards the positive pole of power supply. The directional motion of charged particles is current, and the direction of positive charge motion is generally the positive direction of current. A current whose direction and direction do not change with time is called direct current, and a current whose direction and direction change periodically at any time is called alternating current.

The magnitude of current is called current intensity, and current intensity is called current for short. The common unit of current is ampere or milliampere.

The path through which current flows is the circuit. In the closed circuit, the transmission and conversion of electric energy are realized. The circuit consists of power supply, connecting wires, switching appliances, loads and other auxiliary equipment. A power supply is a device that provides electrical energy. The function of power supply is to convert non-electric energy into electric energy. For example, batteries convert chemical energy into electric energy, generators convert mechanical energy into electric energy, solar cells convert solar energy into electric energy, and nuclear energy converts quality into energy. Dry batteries, storage batteries and generators are the most commonly used power sources. Load is a device that consumes electric energy in the circuit, and its function is to convert electric energy into other forms of energy. For example, an electric furnace converts electric energy into heat energy, and an electric motor converts electric energy into mechanical energy. Lighting appliances, household appliances and machine tools are the most common loads. Switchgear is the load control equipment, such as knife switch, circuit breaker, electromagnetic switch, decompression starter, etc. Auxiliary equipment includes various relays, fuses and measuring instruments. Auxiliary equipment is used to control, distribute, protect and measure circuits. Connecting wires connect power supply, load and other equipment into a closed loop. The function of connecting wires is to transmit electric energy or electrical signals.

Discharge phenomenon in nature

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Ancient discovery

In China, the ancients believed that the phenomenon of electricity was caused by the excitation of Yin and Yang, and Shuo Wen Jie Zi said that "electricity, Yin and Yang excite brilliance, from rain to spirit". "Vocabulary" includes "thunder from behind, electricity from application. Yin and yang become thin and become thunder, and discharge becomes electricity. " There is a record about static electricity in Lun Heng (about the first century AD, that is, the Eastern Han Dynasty). When amber or tortoise shell is rubbed, it can attract light and small objects, and it also describes the phenomenon that silk is rubbed to generate electricity. However, ancient China didn't know much about electricity.

Around 600 BC, the Greek philosopher Thales (640-546 BC) knew that the friction of amber would attract fluff or sawdust, which is called static electricity. Electricity in English means "amber" in ancient Greek. Static electricity in Greek is (elektron)

Modern exploration

/kloc-in the 0/8th century, the west began to explore various phenomena of electricity. American scientist Benjamin Franklin (1706 ~ 1790) thinks that electricity is a weightless fluid and exists in all objects. When an object gets more electricity than normal, it is called positively charged; If it is less than a positive constant, it is called negative charge. The so-called "discharge" is the process from positive current to negative charge (artificially specified). This theory is not entirely correct, but the names positive charge and negative charge have been preserved. The concept of "electricity" in this period is a material proposition.

Franklin did many experiments and put forward the concept of current for the first time. 1752, in a kite experiment, he put a kite with a key in the cloud with a metal wire, and the metal wire wet by rain led lightning in the air between his finger and the key, which proved that lightning in the air and electricity on the ground are the same thing.

From matter to electric field

Electricity began to develop in18th century. J.B.Priestley (1767) and Coulomb (C.A. Coulomb1736-1806) found that the force between electrostatic charges is inversely proportional to the distance, which laid the foundation for static electricity.

/kloc-in 0/800, Italian Volt (A.Voult) made the first battery by immersing copper and tin in salt water and connecting wires. It provided the first continuous power supply and was called the ancestor of modern batteries. 183 1 year, M. Faraday of Britain demonstrated the generation of induced current by using the change of magnetic field effect. In 185 1, he put forward the concept of physical power line. This is the first time to emphasize the concept of charge transfer to electric field.

Electric and magnetic fields

1865, Maxwell put forward the mathematical formula of electromagnetic field theory and provided the concept of displacement current. The change of magnetic field can produce electric field, and the change of electric field can produce magnetic field. Maxwell predicted the existence of electromagnetic radiation, and such electromagnetic waves were shown in H.Hertz of 1887. As a result, Maxwell integrated electricity and magnetism into a theory, which also proved that light is an electromagnetic wave.

The development of Maxwell's electromagnetic theory also explains microscopic phenomena, pointing out the existence of split charges rather than continuity. 1895, H.A. Lorenz assumed that these split charges were electrons, and the role of electrons was determined by the electromagnetic field of Maxwell's electromagnetic equation. 1897, J.J.Thomson of Britain confirmed that the electronicity of these electrons is negatively charged. 1898, W.Wien observed the deflection of anode rays and found the existence of positively charged particles.

From particle to quantum

Humans have always described the world of "electricity" with particles and waves existing in nature. /kloc-in the 0/9th century, the appearance of quantum theory put the originally constructed particle world to the test again. Werner Heisenberg's "uncertainty principle" holds that the velocity and position of a particle cannot be measured at the same time; Electrons are no longer countable particles; Nor does it run in a fixed orbit.

1923, Louis Blay proposed that tiny particles have both particle property and fluctuation when they move, which is called "mass-wave duality", while Erwin Schrodinger used mathematical methods to describe the behavior of electrons with functions, and obtained the probability distribution of electrons in space with wave mechanics model. According to Heisenberg's uncertainty principle, we can't measure accurately. In niels bohr's hydrogen atom model, the electron movement radius of the ground state atom is the position with the largest probability of electron occurrence in the wave mechanics model.

With the development of science, people gradually understand that the values obtained by the physical quantity of electricity are discontinuous and the laws they reflect are statistical.

The great influence of electricity on human life

The discovery and application of electricity greatly saved human physical and mental work, made human strength grow wings and extended human information tentacles. The influence of electricity on human life has two aspects: the acquisition, conversion and transmission of energy and the basis of electronic information technology.

Diandi' an

Interpretation ① An important energy source, widely used in production and life, can emit light, generate heat and generate electricity. Electric lamp | electric furnace | motor. (2) Lightning: lightning | lightning speed. Abbreviation for telegraph: Express telegram | congratulatory telegram | telegram.

= = = = = = = = = = = = More information about this word = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

electricity

Electricity; Electroforming; Electricity;

(1) dribs and drabs

(2) (sound and sound. It got wet, Shen Sheng. Original meaning: lightning)

(3) with the original meaning [lightning]

Electricity, yin and yang are also exciting. -Shuo Wen

Electricity, lightning also. -"Five Classics and General Meaning"

In March, heavy rain shook the electricity. Earthquake, lightning, electricity, whether also. -Gu Liangchuan, lived in seclusion for nine years. Shu: "Whether it is or not, it is another name for thunderbolt. Where there is electricity, there must be electricity, so the cloud says,' electricity, is it also?' According to, whether or not, electricity is the same word, and later it is divided into two meanings: its sound is no matter, and its light is electricity. "

(4) Another example is electric fire (lightning)

(5) Physical term [electricity]. Electricity is a form of energy, including negative electricity and positive electricity, which are composed of electrons and protons respectively, and may also be composed of electrons and positrons. Usually measured in electrostatic units (such as electrostatic coulombs) or electromagnetic units (such as coulombs). It can be observed from the attraction and repulsion of triboelectric objects, and it can also be observed in some natural phenomena (such as lightning or northern lights), usually in the form of current. Such as: positive electricity; Negative electricity; Static electricity; electric resistance

(6) abbreviation of [telegram]

Please call the Shanghai consul to save Mr. Yan. -Liang Qingqichao's Biography of Tan Sitong

(7) Another example: urgent telegram; Congratulatory message; Electric base (telegraph manuscript); overseas call

(8) Metaphor is swift. Such as: electricity to (describe rapid action); Electricity reform (describing rapid changes); Electricity (describing the speed of action); Super-life (using wisdom quickly to get people out of their misery); Go by electricity (describe walking fast); Electric flying (metaphorically flying like electricity); Electric emission (described as powerful as lightning emission); Electric scanning (describing fast action); Electrocution (describing the speed of running); Electric switch (describe quick action); Electric step (describing rapid passing away); Electric elevator (describe fast action)

(9) Metaphor is light. Such as: lightning (figuratively speaking, the light shines like electricity); Telephone (praise others' humor. Shine brightly, like lightning in the sky)

(10) Polite and observant, asking others to be observant [clear]. Such as: electric candle (metaphorically observing clearly); Electric browsing (clear observation; Mingjian); Lightning (viewing); Power failure (switching); Vision (insight)

Torch (electric)

Diangbang

[(electric) torch; Flashlight] flashlight

electric cable

Diambao

[telegram; Telegram; Can communicate remotely; Information sent by telegraph.

cable address

How are you?

[Telegraph address; Telegraph address] the number used by the telegraph operation department to replace the address and name of the telegraph user.

cable

Diombaoje

[Telegraph] A device used to send and receive telegrams.

electricity meter

Diombio

(1) [Electric meter]: the general name of electric instruments, which are used to measure voltage, current, electric power, etc.

(2) [Watthour meter]: Watthour meter.

Dià nb and ngxi ā ng of refrigerator

[refrigerator; fridge

Radio waves do not exist.

[Radio Wave] The period of high-frequency alternating current can be regarded as a wave propagating in a conductor at a certain speed.

power plant

[Power plant] A power plant that converts some form of primary energy into electrical energy for fixed facilities or transportation, such as a hydropower, steam, diesel or nuclear power plant.

Electric field distribution m: ng

[Electric field] There is a region where the charge is close to or the intensity of the surrounding magnetic field changes, and this region exerts a mechanical force on the introduced charge. The direction of the electric field at any point is the force direction of a small positive charge placed at that point.

Electric field intensity dià nch m: ng qi á ngd

[Electric field intensity] The electric field intensity at any point in space is measured by the force on the unit positive charge placed at that point.

electric gramophone

[phonograph; Record player; Electric phonograph: An electric device used to play records.

Trolley Deanci

[tram; Trams; Trams] Electric-driven public transport, including trams and trolleybuses.

punchline

State or explain in a telegram [why] by telegram.

Battery diànchi

[cell; Part of the space of a cup, can or other container or composite container, containing electrolyte solution and metal electrodes to generate current.

Conductive battery

telex

( 1)

Teletypewriter: Teletypewriter.

(2)

[Teletyping]: Teletypewriters send telegrams, that is, fax telegrams.

I have to send two faxes and write some letters back to the hotel.

Electromagnetic diàní

Electromagnetism is a general term for electricity and magnetism.

radio and television university

[TV University] Short for TV University. This kind of university mainly teaches through television, hence its name.

Conductivity dià nd m: o

Electrical conductivity; Electrical conductivity; Measure the difficulty of allowing current to pass through a conductor: the reciprocal of resistance. Moms are units for measuring conductance and are the reciprocal of ohms.

electric light

[electric light; Electric lamp] A lamp that uses electricity as its light source.

Electric dinon

[electric; Driven by electricity.

electric motor

electric flagpole

Motor diàndòngjī:

[motor; Electrically operated; Motor-driven; Electric] A rotating machine that converts electrical energy into mechanical energy. It mainly includes electromagnet winding or distributed stator winding and rotating armature or rotor for generating magnetic field. The current passes through the wire and is rotated by the magnetic field. Some types of these machines can be used as motors or generators.

electroplate

[electroplating; Electroplating: the process of attaching a metal film to the surface of a metal or other material by electrolysis. It can play the role of anti-corrosion, improving wear resistance, conductivity, reflection and aesthetics.

Rice cooker

[Electrical Appliances] Cookware for household appliances. It can automatically cook and steam vegetables, and can automatically keep warm, also known as "rice cooker"

electric fan

electric fan

State Power Corporation

[Send a telegram reply; Telegraph reply

Instant telegraph reply

Polish

telegraph pole

Inductance di dang m: n

When the current below changes, the circuit can produce the property of electromotive force. It also refers to parts made of this property.

Daily Telegraph

Telegram [telegram draft]

cable television

[Notified by radio; Electric wire; Notify sb. by telegram. To notify or report by telegram.

Expect a telegram message

Electrician diàng no ng

( 1)

[Electricity] A worker who installs, maintains, operates or repairs electrical equipment.

(2)

[Maintenance worker]: a maintenance worker who keeps electrical equipment (such as motors, switches or switchboards) running normally.

Diengue

[Telegraph address] Short for telegraph registration.

Diongun power station

[Electric pumping station; Electric pump room] Assembly room for electric-driven irrigation and drainage equipment.

Welding first à à n

Common name of [electric welding]. Welding is realized by heating the parts of metal parts that need to be connected with electric energy.

expense

[Charge] The property that some elementary particles (such as electrons and protons) attract or repel each other.

Congratulations to diànhè.

Congratulations to sb. Send a telegram of congratulations.

arc light/lamp

[Arc] Discharge through a gas, usually characterized by a voltage drop approximately equal to the ionization potential of the gas.

audio-visual aids

[Audio-visual AIDS] Equipment, equipment and systems used to publicize, teach, train talents, record scientific research processes and achievements, and transmit images and sounds, including movies, television, magnetic video recording, audio recording and other media.

audio-visual instruction

[Audio-visual education programmes; Audio-visual teaching AIDS education] Use modern scientific and technological means such as slide show, projection, film, television and closed-circuit television to teach.

telephone number

[telephone; Telephone] A device that transmits sound by means of electrical signals.

Telephone number:

[fellphone number] The number set by the telephone management department for the telephone.

telephone booth

[Telephone booth] A telephone booth where public telephones are installed.

T/T diànhu

[T/T; Handle remittance by telegram

Electric shock di à nj: and

[electric shock; Telegraphic transfer; Send money by telegram] get an electric shock

Be electrocuted

Motor diànj

[Motor] refers to all machines that can convert mechanical energy into electrical energy and electrical energy into mechanical energy. Especially generators and motors.

Electrode diànji

[Electrode] A conductor (such as a metallic substance or carbon) used to establish electrical contact with a nonmetallic part of a circuit, such as an electrolytic battery, a storage battery, an electron tube or an arc lamp.

Electric key

[key; Telegraph button] a metal rod used in telegraph office equipment to make and break circuits quickly and easily.

audio-visual education programme

Audio-visual education project is the abbreviation of audio-visual education.

Electrolytic diànji

[Electrolysis] To decompose a compound by the action of an electric current.

Dielectric dià nji è zhi √.

[Dielectric] A substance that can establish a stable electric field and almost no current flows through it.

reactance

[Reaction] The impedance part caused by capacitance, inductance or both in an AC circuit, and its unit is expressed in ohms.

Cable news network

[Power cable; Power cable is usually a rope-like cable formed by twisting several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and often twisted around a center, and the whole is covered with a highly insulating coating. Especially submarine cables.

Electric soldering iron diànlàotie

( 1)

[Electric iron]: See "Electric iron"

(2)

[Electric soldering iron]: An instrument for melting solder for welding.

ionization

( 1)

[ionization; Ionization]

(2)

Atoms or molecules of liquid or gas are impacted by high-energy particles and irradiated by rays and become positively or negatively charged ions.

(3)

Due to the attraction of polar molecules in the solvent, the electrolyte forms ions in the solution.

Electric power company

[electricity; Electric energy used to do work.

power wheel drive

[Charge amount; Voltage; How much charge does an object carry?

give/receive electrotherapy

[Galvanizing; Electrotherapy; Treat diseases with electrotherapy equipment

The bell rang.

( 1)

[Trembling bells; Electric bell]: a bell that sounds under the action of electricity, which can be started by DC or AC power supply; Often used as signal bell, doorbell, etc.

(2)

Gong bell: a flat bell shaped like a plate, usually with a slight tapping sound from an electric device.

Current dià nliú

[current; The motion of positively or negatively charged particles (such as electrons) is accompanied by some observable effects, such as heat, magnetic field or chemical changes.

Electric furnace diànú

[electric fire; Electric furnace] A furnace with electric energy as the heat source for indoor use.

Electric furnace diànú

[Electric furnace] A furnace heated to a very high temperature by electric current, which is used in industry to melt alloys and refractories.

First Circuit Court

( 1)

[circuit]

(2)

One or a group of interconnected paths that can carry current. The circuit through which direct current passes is called "direct current circuit"; The circuit through which alternating current passes is called an "alternating current circuit"

(3)

For the arrangement of one or more complete and closed electron flow paths

(4)

[circuit]

(5)

A specific part of a circuit.

(6)

Include any displacement current.

(7)

Combination of electronic components

electro-anesthesia

[Neuroparalysis] Loss of consciousness caused by weak current passing through the brain, used to treat some mental diseases.

Code di à nm m

( 1)

[code]: A complete cryptographic system using code groups of standard length (such as 3742 or XEQSJ).

(2)

[Symbols used in telecommunications; Telegraph code]: a symbol used to represent words, numbers, punctuation marks, etc. In telegraph communication.

Switch door

[(electrical) switch] means "switch"

Computer dià nn m: o

Electronic computer

Electric energy diàNNE ng

[electric energy; The energy of current or matter can be transmitted through wires and easily converted into other forms of energy.

Barton ·diànniǔ incarnation

[Button] A button that makes the switch run by opening or closing the circuit.

Battery discharge

[Battery; Battery] the floorboard of the battery.

Electrical equipment

( 1)

[Electrical Appliances]: Household appliances or office supplies operated by electricity.

(2)

[Electrical equipment]: instruments, devices, accessories, accessories, etc. Used as part of or relating to electrical equipment.

Electrified diàNQ Hu.

[power on; Electrification; Refers to the widespread use of electricity in various sectors of the national economy.

Electrothermal diànrè

[Electric heating; Electric heating; Electrothermal] any method of converting electrical energy into thermal energy by preventing the flow of electric current.

Electric blanket dià nrè t m: n

[Electric blanket] A blanket with electric heating wires that can convert electric energy into heat energy can be used as a mattress to keep warm.

Capacitance value

( 1)

[Capacitance; Capacitance]: a characteristic of a non-conductor. When two opposite surfaces of the non-conductor maintain a certain potential difference (as in a capacitor), energy is stored in the non-conductor due to the movement of charge.

(2)

[Capacitance; Capacitor]: common name for capacitor.

Electric mattress di à nr

[Heating pad] The electric heating element is embedded in an elastic pad made of insulating material to keep warm (such as human body).

electric fan

[Electric Fan] A device that uses a motor to drive blades to rotate, so that air can flow and the temperature can be reduced.

TV programs

[TV; Television] the technology of transmitting moving images through electronic equipment is an important way of broadcasting and communication, that is, TV receiver.

TV university

[TV University] An amateur university that conducts teaching activities through television.

videophone

[videophone; Videophone; A telephone in which both parties can see each other's image on the display screen during a call.

Tv tower dànshi fāshèt m:.

[TV Tower] A tower-shaped building with an antenna for TV broadcasting. Also known as TV antenna tower

Dià nshigum on TV: NGB is not?

[TV; Video broadcasting; telecasting

Video conference.

[Video teleconference; Video conference] A meeting held on television.

TV programs

[TV; Television receiver; [TV] A general term for a television receiver.

TV series "Dion Sheji"

[TV series; Tv drama] an artistic style that adapts to the characteristics of TV broadcasting and integrates the artistic expression of stage and film. Generally, there are sub-dramas and series dramas. Making use of TV technology and showing it through TV network.

TV series "I Love You"

[Soap Opera] A kind of TV series, which is divided into many episodes and has a coherent plot.

TV movie "My Dream"

[telefilm] A feature film with a unified theme and a complete structure, which is specially made for playing on TV.

TV channel

[TV Frequency Range] The frequency range used by each TV broadcast channel and its serial number.

Television camera she ngj

[TV camera; Television camera; Television camera: A machine that shoots television, which can convert real images into electronic signals.

Dianxi TV Tower t m:

[TV Tower] is the TV transmission tower.

Dià nshiá i TV station

[TV station] A place where TV programs are broadcast.

Tv satellites diànsh wèIX and ng

[Television satellite] An orbiting satellite that relays television signals between ground stations. It is usually sent to an appropriate altitude (such as over the Atlantic Ocean or the Indian Ocean) so that the broadcast program can be received all over the world through this satellite.

The TV series "Dion Xi" is thump, thump, thump, thump, thump, thump, thump and thump.

[TV series] A group of TV series with closely related contents and certain structural connections.

Potential, potential

[zeta potential] The potential difference between the two ends of the electric dipole layer is usually the electric dipole layer between the solid surface and the liquid.

Armature diànsh

[Armature] A part of a motor equipped with wires that rotates in a magnetic field (as in a motor) due to the relative motion of the wires through the magnetic field between pole pieces, which leads to the induction of current in the wires (as in a generator) or magnetic induction caused by current passing through the wires.

Radio Dientai

[transciever； Radio station; Technical equipment for radio communication. It consists of transmitter, receiver, antenna, power supply and accessories.

Elevator department

[lift; Elevator] an elevator driven by electricity in a building, not going up and down stairs.

flashlight

Small portable lighting equipment powered by battery

Power grid dià nw m: ng

( 1)

[Electrified power grid; Wire winding; Power grid]: A metal mesh that can be electrified to prevent enemies or theft.

(2)

[Transmission line system]: A large-scale power generation and transmission system.

Message diànén

The text of a telegram

Wire diameter

[wire; Flex cable; [Wire] A wire that conducts current.

Telephone pole

[telephone pole; [telegraph pole] A post used to erect wires.

telecom

[Telecommunications] A mode of transmitting or receiving information or signals in a communication system.

electrocution

Electrocution] A cruel punishment that sends an electric current through a person's body to torture him or execute him.

Telecom diàNXún

( 1)

[Telegraph transmission]: Information transmitted by telegraph, telephone, etc.

(2)

[Telecommunications]: Radio signals

Voltage diànyā

[voltage; Electric potential; Potential or potential difference in volts.

first day

[condolence telegram] A letter of condolence sent by telegram.

Invite diànyāo

Telegraph invitation, telegram invitation to the north

electric chair

[hot chair; Electric chair; A chair-shaped instrument used to perform electrocution.

The movie Diagon

( 1)

[Motion picture; Cinema; Film camera; Movies; Movie]

(2)

A series of captured images are displayed quickly and continuously, creating a sense of coherence and activity.

(3)

A coherent and moving image that expresses a complete theme.

film script

[Screen play; A script written for filming.

Nanjing cinema

[Movie House; Cinema; Movies; [Cinema] An indoor cinema dedicated to showing movies to the public.

electric power supply

[power supply; Power supply] A device that provides power for electronic equipment.

electric iron

[Electric iron] Electric iron.

Dionza switch

【 Main power (source) switch 】 Large power switch.

Dienham power station

( 1)

[Power station]: Power station

(2)

[Substation]: Substation

Electronic diànzǐ

[Electrons] The elementary particle of an atom, which has a small mass and rotates around the nucleus with a negative charge.

Electronic watch dià NZ ǐ bi ǐ o

[Electronic Watch] Watches equipped with electronic components are generally divided into two types: liquid crystal display numbers and timely hands.

radio tube

[electron tube; Valve 】 An electronic device used to utilize and control the conduction of electron flow, which can play the role of rectification, amplification, detection and oscillation.

electronic computer

[computer; Electronic calculator] A tool that uses electronic technology to realize mathematical operations.

electronic calculator

[Electronic calculator] A simple and small electronic computing device, generally used for arithmetic operations.

Electronic music dià NZ ǐ y and Nyuè

[electronic music; [Electronic Music] Music produced by the sound of electronic parts.

electronic game

[Computer Games] A game played with electronic instruments.

Electric drill diànzuàn

Electric drill

electric current

Dion

( 1)

Physical phenomenon, a kind of energy that can be obtained by chemical or physical methods, is used to make lamps shine, mechanically rotate, etc. : ~ force. ~ yes. ~ hot. ~ Taiwan Province.

(2)

On rainy days, the light emitted by clouds in the sky when discharging: flash ~. Ray ~.

(3)

Of telegrams: by ~. Congratulations.

(4)

Send a telegram: ~ invitation. ~ remittance. ~ tell.

(5)

Hit by electric current: ~ gave me an electric shock.