Electrical basics electrical safety electricity is a wonderful utility, but can be dangerous if not approached carefully. While every effort has been made to ensure the accuracy of this information, errors can occur. Practical implementation of fundamental theory concepts. The fundamental laws of electricity a strong foundation for any electrical worker is built on a thorough knowledge of the laws that govern the operation of electricity.
Download pdf electrical objective type questions answers in hindi. In the above formulas 1 is the angle of lead or lag between current and voltage and cos 1 pei power factor or pf. Know the fundamental of electrical engineering and practical. The rules of the national electrical code are written for people who have a preexisting knowledge of electricity. Dec 14, 2015 dec 14, 2015 complete electrical formulas sheet electrical engineering blog stay safe and healthy. In order to construct a building that will last into the future, a strong foundation is a prerequisite. This flow of electrical charge is referred to as electric current.
Ohms law calculator voltsvoltage, ampscurrent, ohms. This information is provided as a quick reference resource and is not intended to serve as a substitute for qualified engineering assistance. Power, voltage, current, resistance formulas for dc circuits with easy explanation p, v, i, r, formulas. The handbook contains a wide array of topics and each topic is written by an authority on the subject. We can find the following quantities by using below formulas chart electrical formulas in dc full load current in amperes alternating current ac motors alternating current ac single. All impedances must be calculated in complex number form for these equations to work. Students will learn different applications of commonly used electrical machinery. It helps you to shape up your technical skills in your everyday life as an electrical engineer. Electrical formulas for load calculation electrical. Ohm unit of resistance one ohm is the resistance offered to the passage of one ampere when impelled by one volt. Finding motor hp horse power, kva kilovolt ampere kw input, when motor hp is known.
This series of articles on electrical theory is designed to be a refresher course for the electrical. Even though basic electrical theory was not understood until much later, electricity has existed in the world since the beginning of time. The electrical science fundamentals handbook was developed to assist nuclear facility operating contractors provide operators, maintenance personnel, and the technical staff with the necessary fundamentals training to ensure a basic understanding of electrical theory, terminology, and application. Full load current in amperes alternating current ac motors alternating current ac single.
Long before anyone heard the word electricity, people had seen lightning and experienced shocks from electric fish. Volt unit of electrical potential or motive force potential is required to send one ampere of current through one ohm of resistance ohm unit of resistance one ohm is the resistance offered to the passage of one ampere when impelled by one volt. This equipment is needed in systems of electric lighting and power, and intercommunications. Volt unit of electrical potential or motive force potential is required to send one ampere of current through one ohm of resistance. The electrical science handbook consists of fifteen modules that are contained in four volumes. Alternating current alternating or to find singlephase threephase to find direct current amperes when hp x 746 hp x 746 amperes when voltage and e. No single discovery has affected our lives, our culture and our survival more than electricity. Ac voltage at home is 230v but its equation is vvm sin explain the difference. States navy who does not use electrical or electronic equipment. Students will learn strong basics of electrical engineering and practical implementation of electrical fundamentals. Anonymous some one has hijacked one of your links electrical formulas and calculations. The general laws that govern electricity are few and simple, but they are applied in an unlimited number of ways. Most commonly used electrical formulas are formulas related to voltage, current, power, resistance etc. Conventional flow will be used from this point on in these training modules unless otherwise stated.
For consultation and interpretation of components, devices and electrical and electronic circuit. Almost all the projects in class will be powered by dc electricity. Volume 1 of 4 module 1 basic electrical theory this module describes basic electrical concepts and introduces electrical terminology. Much has to be learned to fully understand electrical theory, and it takes years to master. Engineers mininotebook formulas, tables and basic circuits. If the circuit components are connected end to end to form a single loop it is a seriescircuit. Active power is the resistive power and equals the equivalent heating effect on water. Finding motor hp horse power, kva kilovolt ampere kw input, when motor hp is known kw kilowatts amperes, when kva is known. Download pdf electrical questions answers in hindi. Pdf electric power systems formula sheet formula sheet.
As a construction electrician, your understanding and knowledge of basic electrical theory will able to conduct the navys mission. Scientists, such as faraday, ohm, lenz, and kirchoff have found that electricity seems to behave in a constant and predictable manner in a given condition. Download pdf electrical interview questions answers in hindi. In order to make sense of the code, you must first understand basic electrical concepts such as voltage, amperage, resistance, ohms law, wattage, circuit theory and others. Common electrical units used in formulas and equations are. E i x r i e r r e i p e x i direct current electricity an electrical current can flow in either of two directions through a conductor. Very simple basic electrical quantities formulas with simple explanation in dc circuits. Electrical electronics engineering formulas electrical. Not every day will include working with complicated electrical formulas, but there will times during your career as an electrician when you will have to do some calculations. Download pdf electrical multiple choice questions answers in hindi. Either theory can be used as long as the orientations are correct. Complete electrical formulas sheet electrical engineering. Introduction to unit 1electricians math and basic electrical formulas in order to construct a building that will last into the future, a strong foundation is a prerequisite.
If it flows in only one direction whether steadily or in pulses, it is called direct current dc. Electrical is the branch of physics dealing with electricity, electronics and electromagnetism. Electrical formulas play a great role in finding the parameter value in any electrical circuits. Electrical formulae for calculating amps, horsepower. There are two types of current, direct current dc and alternating current ac. A basic understanding of electrical theory is important in order to understand your job as a construction electrician. Ampere units of current one ampere is the current which one volt can send. Dc is current that flows in one direction with a constant voltage polarity while ac is current that changes direction periodically along with its voltage polarity.
From its beginnings in the late nineteenth century, electrical engineering has blossomed from focusing on electrical circuits for power, telegraphy and telephony to focusing on a much broader range of disciplines. To convert a number which includes the k prefix to units, multiply the number preceding the k by 1,000. The treatment throughout the handbook is practical with very little emphasis on theory. Conventional flow will be used from this point on in these training modules unless otherwise. Download electrical engineering formulas smps pdf file for free, get many pdf ebooks from our online library related with electrical engineering formulas smps. Get access to premium hvmvlv technical articles, electrical engineering guides, research studies and much more. Electrical theory is important to understand the function and operation of electrical equipment to ensure proper installation and to complete tasks such as troubleshooting electrical systems and equipment. Electronic formulas ohms law formulas for dc circuits.
Read online and download pdf ebook electrical engineering formulas smps. The letter k is used in the electrical trade to abbreviate the metric prefix kilo, which represents a value of 1,000. This is true regardless of which type of electrician job you choose. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Zero sequence networks of transformers, neglecting phase shift and shunt admittance. The following is a brief description of the information presented in each module of the handbook. Ohms law formulas for ac circuits and power factor. The handbook of electric power calculationsprovides detailed stepbystep calculation procedures commonly encountered in electrical engineering. Electrical circuit calculations series circuits many circuits have more than one conversion device in them i.