Engineering English
1 Voltage /ˈvoʊltɪdʒ/ Gerilim
The difference in electric potential energy per unit charge between two points in a circuit, which drives charge to flow. It is measured in volts.
Electrical Engineering Terms in English
Electrical Engineering English covers vocabulary for power systems, circuits, motors and transmission — voltage, impedance, transformers, protection and grid terminology. This free glossary lists the 60 most frequently used of the 515 Electrical Engineering terms in the Engineering English iOS app — each with IPA pronunciation and a working definition. In the app, every term also includes example sentences, translations in 21 languages, flashcards and AI conversation practice.
Power-system standards such as IEC and IEEE publications are written in English, and so are most protection-relay manuals, single-line diagrams and commissioning reports. Electrical engineers working across borders rely on this exact terminology to stay precise and safe.
Last updated: July 30, 2026 · How terms are selected and ranked · 🇹🇷 Türkçesi
Quick answer: The 10 most frequently used Electrical Engineering terms in English are Voltage, Current, Resistance, Transformer, Generator, Circuit Breaker, Thevenin's Theorem, Norton's Theorem, Phasor, Resonance. The full Engineering English library contains 515 Electrical Engineering terms with pronunciation, example sentences, translations and flashcards.
The 60 most-used Electrical Engineering terms, ranked by frequency
2 Current /ˈkɜːrənt/ Akım
The rate at which electric charge flows past a given point in a conductor, measured in amperes. Its magnitude depends on the applied potential difference and the opposition of the circuit.
3 Resistance /rɪˈzɪstəns/ Direnç
The property of a material or component that opposes the flow of electric charge and converts electrical energy into heat. It is measured in ohms.
4 Transformer /trænsˈfɔːrmər/ Transformatör
A static electrical machine that transfers energy between two or more circuits by electromagnetic induction. It changes voltage and current levels while keeping the supply frequency unchanged.
5 Generator /ˈdʒɛnəreɪtər/ Jeneratör
A rotating machine that converts mechanical energy into electrical energy by moving conductors through a magnetic field. It supplies current to an external electrical network or load.
6 Circuit Breaker /ˈsɜːrkɪt ˈbreɪkər/ Devre kesici
An automatic switching device that interrupts current flow when a fault such as an overload or short circuit is detected, and can be reclosed after operation.
7 Thevenin's Theorem /ˈθɛvənɪnz ˈθɪərəm/ Thevenin teoremi
A method for simplifying a linear electrical network into an equivalent circuit consisting of a single voltage source in series with a single impedance, used to analyze the voltage and current at a specific load.
8 Norton's Theorem /ˈnɔːrtənz ˈθɪərəm/ Norton teoremi
A technique that simplifies a linear electrical network into an equivalent circuit with a single current source in parallel with a single impedance, useful for analyzing load current.
9 Phasor /ˈfeɪzɔr/ Fazor
A complex number representing the magnitude and phase angle of a sinusoidal electrical quantity such as voltage or current. Phasors simplify the analysis of AC circuits by converting time-domain waveforms into frequency-domain vectors.
10 Resonance /ˈrɛzənəns/ Rezonans
Resonance in an AC circuit occurs when the inductive reactance and capacitive reactance are equal in magnitude, causing the impedance to be purely resistive. At resonance, the circuit's current is maximum in a series RLC circuit or minimum in a parallel RLC circuit.
11 RMS /ɑr ɛm ɛs/ RMS
RMS stands for Root Mean Square, a statistical measure of the magnitude of a varying quantity. For AC signals, it represents the equivalent DC value that produces the same heating effect in a resistor.
12 Frequency /ˈfriːkwənsi/ Frekans
Frequency is the number of complete cycles of a periodic waveform that occur per unit time, typically measured in hertz.
13 Average Power /ˈævərɪdʒ ˈpaʊər/ Ortalama güç
Average power in an AC circuit is the mean over one cycle of the instantaneous power, equal to the product of RMS voltage, RMS current, and the cosine of the phase angle. It represents the actual power dissipated by a load.
14 Input Impedance /ˈɪnpʊt ɪmˈpiːdəns/ Giriş Empedansı
The impedance measured at the input terminals of a network when no load is connected, determining how the network interacts with a source.
15 Output Impedance /ˈaʊtpʊt ɪmˈpiːdəns/ Çıkış Empedansı
The impedance measured at the output terminals of a network when the input is terminated properly, indicating how the network behaves when driving a load.
16 Frequency Response /ˈfriːkwənsi rɪˈspɒns/ Frekans Cevabı
The steady-state response of a circuit or system to sinusoidal inputs at various frequencies, typically represented by a magnitude and phase plot.
17 Grounding Electrode /ɡraʊndɪŋ ɪlɛktrəʊd/ Topraklama Elektrotu
A grounding electrode is a conductor or group of conductors that establishes a direct connection to the earth. It provides a reference point for the electrical system and safely dissipates fault currents.
18 Ground Fault Circuit Interrupter /ɡraʊnd fɔːlt ˈsɜːrkɪt ɪnˈtɛrʌptər/ Toprak Kaçağı Devre Kesici
A device that quickly disconnects a circuit when it detects a difference in current between the hot and neutral wires, indicating a leakage to ground. It protects against electric shock.
19 Equivalent Circuit /ɪˈkwɪv.ə.lənt ˈsɜː.kɪt/ Eşdeğer devre
A simplified representation of an electrical machine using ideal components to model its behavior. It allows engineers to calculate voltage, current, and power losses under different operating conditions.
20 Synchronous Speed /ˈsɪŋ.krə.nəs spiːd/ Senkron hız
The rotational speed of the magnetic field in an AC motor or generator, determined by the supply frequency and number of poles. It is the speed at which the rotor would turn if it were perfectly locked to the field.
21 Squirrel Cage Rotor /ˈskwɪr.əl keɪdʒ ˈroʊ.tər/ Sincap kafesli rotor
A rotating assembly in an induction motor consisting of conductive bars shorted by end rings, resembling a cage. It provides a rugged, low-maintenance design with high starting torque.
22 Governor /ˈɡʌvərnər/ Regülatör (Hız regülatörü)
A governor controls the speed of a prime mover such as a turbine or engine by adjusting the fuel or steam input. It maintains the rotational speed at the setpoint despite load variations.
23 Multimeter /ˈmʌltɪmiːtər/ Multimetre
A versatile electronic measuring instrument that combines the functions of voltmeter, ammeter, and ohmmeter. It is used to measure voltage, current, and resistance in electrical circuits.
24 Cable Fault Locator /ˈkeɪbəl fɔːlt ləʊˈkeɪtə/ Kablo Arıza Bulucu
A cable fault locator is an instrument used to determine the location of a fault in an electrical cable, such as a short circuit or open circuit. It often employs time-domain reflectometry to send a pulse and measure the reflection time.
25 Continuity Test /ˌkɒntɪˈnjuːɪti tɛst/ Süreklilik testi
A continuity test verifies that an electrical path is unbroken and has a very low resistance, typically using a multimeter or dedicated continuity tester. It is used to check wiring, connections, and protective bonding.
26 IGBT /aɪ dʒiː biː tiː/ Yalıtımlı Geçitli Bipolar Transistör
A three-terminal semiconductor device combining high input impedance of MOSFETs with low saturation voltage of bipolar transistors. It is widely used in power electronics for switching and amplification.
27 PWM /piː dʌbəl juː ɛm/ Darbe Genişlik Modülasyonu
A modulation technique where the width of a pulse is varied in proportion to a control signal. It is used to encode information or regulate power delivered to loads.
28 Buck Converter /bʌk kənˈvɜːrtər/ Buck dönüştürücü
A buck converter is a DC-to-DC power converter that steps down voltage from its input to its output while maintaining high efficiency.
29 Boost Converter /buːst kənˈvɜːrtər/ Yükselten dönüştürücü
A boost converter is a DC-to-DC power converter that steps up voltage from its input to its output while maintaining high efficiency.
30 Voltage Source Inverter /ˈvoʊltɪdʒ sɔrs ɪnˈvɜrtər/ Gerilim Kaynaklı İnverter
A voltage source inverter is a power electronic device that converts a constant DC voltage into an AC voltage of variable frequency and amplitude. It typically uses pulse width modulation to synthesize the output waveform.
31 Shunt Capacitor Bank /ʃʌnt kəˈpæsɪtər bæŋk/ Şönt kondansatör bankası
A shunt capacitor bank is a group of capacitors connected in parallel to a power system to supply reactive power, improve power factor, and support voltage levels. It is commonly used in industrial and utility networks for reactive power compensation.
32 Load Flow /loʊd floʊ/ Yük akışı
A numerical analysis that calculates voltage magnitudes, phase angles, power injections, and line flows in an electric power network under steady-state conditions. It is essential for planning and operation.
33 Potential Transformer /pəˈten.ʃəl trænsˈfɔːr.mər/ Gerilim trafosu
An instrument transformer that steps down high voltage to a lower, safe value for metering, protection, and control applications.
34 Overhead Line /ˈoʊvərˌhɛd laɪn/ Havai hat
An overhead line is an electric power transmission or distribution line suspended above the ground using poles or towers.
35 SCADA /ˈskɑːdə/ SCADA
SCADA stands for Supervisory Control and Data Acquisition, a system used for remote monitoring and control of electrical power networks. It collects real-time data from field devices such as circuit breakers and transformers to enable operators to manage grid operations efficiently.
36 Interrupting Rating /ɪn.təˈrʌp.tɪŋ ˈreɪ.tɪŋ/ Kesme kapasitesi
Interrupting rating is the maximum fault current that a circuit breaker or switchgear can safely interrupt without damage. It is also known as breaking capacity.
37 Battery Management System /ˈbætəri ˈmænɪdʒmənt ˈsɪstəm/ Batarya yönetim sistemi
An electronic system that manages a rechargeable battery pack by monitoring its state, ensuring safe operation, and balancing cell voltages. It protects the battery from operating outside safe limits.
38 State of Charge /steɪt əv tʃɑːrdʒ/ Şarj durumu
The level of electric charge stored in a battery relative to its full capacity, usually expressed as a percentage. It is analogous to a fuel gauge for a battery system.
39 Low Voltage Ride-through /loʊ ˈvoʊltɪdʒ raɪd θruː/ Düşük gerilim üstesinden gelme
Low voltage ride-through is the capability of an electrical device, typically an inverter or generator, to remain connected and operational during a temporary voltage dip or sag on the power grid. This requirement ensures grid stability and prevents unnecessary disconnection of renewable energy sources during faults.
40 Ohm's Law /ˈoʊmz lɔː/ Ohm yasası
The fundamental relationship stating that the current through a conductor between two points is directly proportional to the potential difference across them and inversely proportional to the opposing resistance.
41 Alternating Current /ˈɔːltərneɪtɪŋ ˈkɜːrənt/ Alternatif akım
An electric current whose direction reverses periodically, usually following a sinusoidal waveform at a fixed frequency. It is the standard form used for generation, transmission and distribution of electrical energy.
42 Direct Current /dəˈrekt ˈkɜːrənt/ Doğru akım
An electric current that flows in one direction only, with a magnitude that is constant or varies without reversing polarity. Batteries, solar cells and rectifiers all supply it.
43 Electric Circuit /ɪˈlektrɪk ˈsɜːrkɪt/ Elektrik devresi
A closed conducting path through which electric charge can flow, typically containing a source of energy, connecting conductors, and one or more components that use or control that energy.
44 Short Circuit /ʃɔːrt ˈsɜːrkɪt/ Kısa devre
An abnormal low-resistance connection between two points of differing potential, allowing an excessive current that bypasses the intended load. It usually causes protective devices to operate.
45 Ground /ɡraʊnd/ Topraklama
A conductive connection to the earth or to a common reference point of zero potential, provided to ensure safety and to establish a stable voltage reference for equipment.
46 Conductor /kənˈdʌktər/ İletken
A material or component in which electric charge moves freely, allowing current to pass with little opposition. Copper and aluminium are the metals most often used for this purpose.
47 Induction Motor /ɪnˈdʌkʃən ˈmoʊtər/ Asenkron motor
An alternating-current motor in which rotor current is produced by electromagnetic induction from the stator field rather than by a direct electrical connection. Its rotor always turns slower than the rotating field.
48 Inverter /ɪnˈvɜːrtər/ Evirici
A power electronic stage that converts direct current into alternating current with a controlled voltage and frequency. Switching devices are pulse-width modulated to shape the output waveform.
49 Power Grid /ˈpaʊər ɡrɪd/ Elektrik şebekesi
An interconnected network that delivers electricity from producers to consumers, comprising generating stations, transmission lines, substations, and distribution facilities.
50 Transmission Line /trænzˈmɪʃən laɪn/ İletim hattı
A conductor system that carries electrical energy at high voltage over long distances from generating stations to substations.
51 Fuse /fjuːz/ Sigorta
A protective device containing a metal element that melts and opens the circuit when the current exceeds a safe value for a given time.
52 Neutral /ˈnjuːtrəl/ Nötr
The conductor or system point, normally at or near earth potential, that carries return current and provides a reference for the phase voltages.
53 Three-Phase System /θriː feɪz ˈsɪstəm/ Üç fazlı sistem
An alternating-current power system that uses three voltages of equal magnitude displaced by 120 degrees, enabling efficient transmission and smooth motor operation.
54 Electrical Installation /ɪˌlɛktrɪkəl ˌɪnstəˈleɪʃən/ Elektrik tesisatı
The complete assembly of wiring, protective devices, and equipment fitted in a building or facility to distribute and use electrical energy safely.
55 Earthing /ˈɜːθɪŋ/ Topraklama
The practice of connecting exposed conductive parts of an installation to the general mass of earth so fault currents can flow safely to ground.
56 Maximum Power Transfer Theorem /ˈmæksɪməm ˈpaʊər trænsˈfɜːr ˈθɪərəm/ Maksimum güç transfer teoremi
States that the maximum power is delivered from a source to a load when the load impedance equals the complex conjugate of the source impedance in AC circuits, or the load resistance equals the source resistance in DC circuits.
57 Superposition Theorem /ˌsuːpərpəˈzɪʃən ˈθɪərəm/ Süperpozisyon teoremi
A theorem stating that in a linear circuit with multiple independent sources, the total voltage or current is the algebraic sum of the contributions from each source acting alone with all other sources turned off.
58 Complex Power /ˈkɑmplɛks ˈpaʊər/ Karmaşık güç
Complex power is a mathematical representation of AC power as a complex number, combining real power (P) and reactive power (Q). Its magnitude is apparent power (S), and it is expressed in volt-amperes (VA).
59 Nodal Analysis /noʊdəl əˈnæləsɪs/ Düğüm analizi
Nodal analysis is a method for determining unknown voltages at circuit nodes by applying Kirchhoff's current law. It is fundamental for solving complex electrical networks.
60 Power Factor Correction /ˈpaʊər ˈfæktər kəˈrɛkʃən/ Güç faktörü düzeltmesi
Power factor correction is the process of improving the power factor of an electrical system by adding reactive elements, typically capacitors. It reduces energy losses and improves system efficiency.
Electrical Engineering terms — frequently asked questions
What are the most common Electrical Engineering terms in English?
The 10 most frequently used Electrical Engineering terms in the Engineering English library are Voltage, Current, Resistance, Transformer, Generator, Circuit Breaker, Thevenin's Theorem, Norton's Theorem, Phasor, Resonance. This page lists the top 60 of 515 terms, ranked by usage frequency.
How many Electrical Engineering terms are in the Engineering English app?
515. Each one includes an IPA pronunciation, a plain-English definition, a real example sentence and translations in 21 languages; the 60 most frequent are free to browse on this page.
How do you pronounce Electrical Engineering terms in English?
Every term on this page shows its IPA transcription — for example Voltage is pronounced /ˈvoʊltɪdʒ/, Current is /ˈkɜːrənt/ and Resistance is /rɪˈzɪstəns/. The Engineering English app also plays audio for each term and checks your pronunciation with speech recognition.
455 more Electrical Engineering terms in the app
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