Electrical Engineering

If you want to know all about electrical engineering – you’ve come to the right place.

Theory4power.com is dedicated to teaching and sharing all subjects associated with electrical and electronics engineering.

Table of Electrical Engineering contents

safe working methods

Safe Working Methods

Electrical and electronics work is a deadly risky job. A little carelessness can be the cause of a big accident. we who are involved in electrical work will always try to adopt safe working methods. Here we will discuss safe working methods.

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hand tools

Hand Tools

Different types of hand tools are used in electrical and electronics work. Tools that help us get things done easily. Here we will discuss all the tools such as –

Hand tools maintenance requirements, the name of the equipment used in electrical work, a description of all the work used, etc.

basics of Electrical Engineering

Basic Electricity

Here we will discuss the basics of Electrical and Electronics Engineering in a consistent manner, such as –

Matter, elemental matter, compound matter, atom, electron theory, electricity, static electricity, electromotive force, voltage unit, current, resistance, regulator, Ohm’s law, electrical circuit, series-parallel circuit, Karshaf’s formula, etc.

electrical conductors and insulators

Electrical Conductors And Insulators

All components used as electrical and electronics conductors and insulators will be discussed in detail here: –

Silver, Copper, Aluminum, Iron and Steel, Copper clad Steel, Aluminum clad steel, Metals with general insulation, Mica, Mica Knight, Glass, Porcelain, Rubber, Paper, Silk, Polyvinyl Chloride, Asbestos, Oil, Wire & Cable,

Weatherproof Wire, Underground Cable, Wire Gauge, Micrometer, Wire Size, Cable Grade, Wire & Cable Code, VIR. And PVC. List of the current-carrying capacity of wires, etc.

joint and soldering

Soldering, Power, And Energy

Here we will give you clear information about joint and soldering, electric power and energy such as: –

Classification of joint, wire and cable joint, requirements of its joint, proper connection of wires, requirements of soldering, soldering method, warning, electric power. , Kilowatt and horsepower, heating action due to electric current flow, energy, watt-hour, BOT unit, electrical device, switch, main switch, socket, fuse, circuit breaker, fuse and wire size, etc.

Magnets and magnetism

Magnet and Magnetism

Magnets and magnetism are an integral part of electrical engineering, we will discuss this topic here as: –

Magnet pole, magnet classification, magnet classification, use of the permanent magnet, the difference between permanent and temporary magnet, magnetic field, magnetic force line, magnetic flux, magnetic force, magnetic field Induction, magnetic axis, magnetic neutral axis, retentivity, electrical and electronics,



In this chapter, Illumination will be discussed Such as – Incandescent Lamp, Lighting System, Light Reflection, Light Unit, Lamp Classification, Halogen Lamp, Arc Lamp, Gas Discharge Lamp, Mercury Iodine Lamp, Sodium Vapor Lamp, electrical and electronics,

Rule Lamp, Fluorescent Lamp, Fluorescent Lamp Advantages and Disadvantages, Fluorescence Lamp CircuitsCapacitor work, starter work, thermal starter connection Chie, faults and remedies of fluorescent lamps, list of different lamps, list of lights by location. The power of different lamps was given in watts to illuminate the rooms of the building, etc.



Let’s talk about earthing here likePurpose of earthing, the purpose of earthing equipment, where to do earthing, earthing electrode, pipe electrode for maximum 20 kW 400 volts, protection of earthing lead, voltmeter and ammeter method, three-point method, earthing testing method, warning,

AC Generator

A.C. Generator

In this chapter, AC Generator will be discussed Such as – Principle of the alternator, the structure of the alternator, the voltage equation of the alternator, a. C. Field accretion method of the generator, the distribution factor and pitch factor, load properties, synchronizing alternator, synchronizing method, load distribution among alternators, etc.

DC generator

D. C. Generator

In this episode, we will discuss the DC generator like: –

A.C. Basics of generators, commutators, and brushwork, basics of direct current, d. C. The working method of the generator, d. C. The names of the different parts of the generator d. C. Fieldwork of the generator, work of armature, d. C. E. of the generator. M. F. Equations of, e.g.,


Transformer In electrical engineering

The transformer is an integral part of electrical engineering, we will discuss this topic here as –

Primary and secondary wiring, the principle of the transformer, what happens when secondary wiring is connected to load, work of transformer, classification of the transformer,

Induction motor

Induction Motor

Induction motor is an integral part of electrical and electronics engineering, we will discuss this topic here as-

Rotating magnetic field, how to generate rotating magnetic flux by the 3 – phase current, induction motor, the principle of induction motor, a. C. Motor, Squirrel Cage Motor, Slip-Ring Motor, Name of different parts of Slip-Ring Motor, Slip-Ring Type Rotor,

Advantages and Disadvantages of Slip-Ring Motor, Torque, Starting Torque, Running Torque, Slip, Rotor Frequency, Induction Motor Speed Change, Characteristics of induction motor, example, etc.

DC  Motor

D.C Motor In electrical engineering

In this episode, we will discuss DC Motor like –

D. C. Motor torque generation method, d. C. Motor class, d. C. Basics of the motor, series motor, shunt motor, compound motor, use of the cumulative compound motor, use of the differential compound motor,

motor torque back e. M. F. Armature current, d. C. Motor reversal, D. C. The need for a motor commutator, d. C. Motor faults and remedies, d. C. Use of the motor, etc.

Single Phase motor

Single Phase Motor

Single Phase motor is an integral part of electrical engineering, we will discuss this topic here as –

Basics of single-phase motor, single-phase induction motor, stator phase split motor, capacitor start induction motor, centrifugal switch operation, capacitor start and run the motor, fan calculation according to room, capacitor working, capacitor working, motor capacitor Run motor, sided pole motor, different parts name, electronic engineering,

Motor starter

Motor Starter In electrical engineering

Let’s talk about Motor starter here like –

Starter function, motor nameplate information, motor starter requirements, D, C Motor starter, D, c. Formation of starter, n. V. R. (N. V. R), and L. R. L. R) Three-end starter, four-end starter, series motor starter,

Armature Winding

Armature Winding

Let’s talk about Armature Winding here like – Armature Inductor, Turn, Yed Turn, Armature Coil, Coil Side, Coil Lead, Coil Goop

Coil Connection, Gup Connection, Phase Connection, Winding Pitch, Pole Pitch, Pitch Factor, Corded Wiring, Single Layer Winding, Double Layer Winding, Winding, Flat Loop Winding, Concentric Winding, Basket Winding, Chain Winding,



In this chapter, Electronic will be discussed Such as – Diodes, Semiconductor Diodes, Diode Testing Procedures, Metal Diodes, Requirement of Rectifier, Half Wave Rectification, Filter Direct Current, electrical and electronics, electronic components,


Capacitor In electrical engineering

In this chapter, Capacitor will be discussed Such as – Capacitor, Farad, Mycofarad, Class Division of Capacitor, basic electronics, Capacitor Function, Capacitor Power, Example, and Solution, etc.

Battery of electrical and electronics

Battery In electrical engineering

In this chapter, Battery will be discussed Such as –

Cell, electrolyte, electrode, battery, cell classification, general voltaic cell, cell e. MF. Cell p. D. Charging, Discharging, General Cell Difficulty, Daniel Cell, Function Theory, Leclanche Cell, Action Theory, Drycell, MercuryDifferent parts of lead-acid battery Chemical reaction of the lead-acid cell,

Transmission and Distribution of electrical and electronics

Transmission And Distribution

In this chapter, Transmission and Distribution will be discussed Such as – Substation, classification of substations, different voltage requirements, line diagram, 3-phase 3-wire system, 3-phase 4-wire system, 1-phase 3-wire system, electric pole or poles, pole classification, wooden pole Structure,

Electrical Measurement of electrical and electronics

Measuring Instrument

In this chapter, Measuring Instrument will be discussed Such as – Electrical Operation Theory, Ammeter, Ammeter Classification, Ammeter Requirement, Ammeter Connection Method, Saint Requirement, Saint Connection Method, Ammeter Teaching Method, electronic circuit,

Ac circuit of electrical and electronics

A.C. Circuit In electrical engineering

AC Circuit is a part of Electrical and Electronics Engineering. We will discuss different parts of the AC circuit such as: –

Intermediate current has more advantages than direct current, polyphase has more advantage than single-phase, initial term, characteristics of intermediate current, cycle, period, frequency, peak or amplitude, instantaneous, average, r. M. S. Its values, Form Faster, Peak Faster, Electrical Degree, Phase, Vester, Scalar, Phase, Infuse, electrical and electronics,

house wiring of electrical and electronics

House Wiring In electrical engineering

House Wiring is a part of Electrical and Electronics Engineering. We will discuss different parts of house wiring such as – Internal wiring, cleat wiring, casing, and capping wiring, batten wiring, batten wiring method, colloid wiring, names and pictures of colloid fittings, surface colloid wiring steps, pulling through the colloid pipe, Surface and concealed colloidal wiring method, trunking wiring,

Electrical Appliances of electrical and electronics

Electrical Appliances

The electrical devices we use on a daily basis include electrical appliances of electrical technology.

Refrigerator of electrical and electronics


Refrigerators are one of the most important devices in electrical technology. At present we see its use in every home. Since its use is more so its maintenance work is more. In this episode, we will discuss these such as – Refrigerator system, the concept of air conditioning system, name of the main appliance, compressor, condenser class division, evaporator, refrigerator, reel requirement, overload protector, requirement, electric circuit diagram, thermostat, thermostat,

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