# Introduction To Electric Circuit In Electrical Engineering With Example

## Introduction To Electric Circuit In Electrical Engineering

An electrical circuit is a closed connection of batteries , resistors , wires, switches, and many others. An electrical circuit consists of voltage loops and present nodes. Many individuals are confused with advanced electrical circuits, nonetheless, in the event that they develop a strong understanding of the beneath 4 electrical circuit examples, will probably be simpler for them to learn advanced electrical circuits.

In order to appreciate the nature of electricity, it is necessary to consider the structure of matter. Matter has been defined any thing that occupies space and has weight such as copper, iron, water, air, smoke, aluminium, silver etc.Matter is made up of extremely small particles known as molecules. A molecule is the smallest particle into which a given substance may be divided without changing its identity. Molecules can further be subdivided chemically into still minute particles known as atoms.

According to modern electron theory, the atoms of all elements are composed of two parts, namely the central nucleus and the surrounding or orbital electrons. However, nearly all atoms have some electrons which are loosely bound to their nuclei. These electrons are known as free electrons and may be dislodged by one means or another and transferred from one atom to another. The body, that contains unequal number of electrons and protons is said to be electrically charged. The atoms of some materials such as silver, copper, aluminium and zinc, known as conductors, have many free electrons. These free electrons of a metal move about haphanrdly in all directions from atom to atom but when a certain electrical pressure or potential is applied to such metals at the two ends, the electrons move only in one direction. The drift of electrons in a conductor in one direction is known as the electric current i.e. the flow of electric current takes place by the movement of the electrons in a conductor.

## ExamplesElectrical Circuits – Motor Meter or Energy Meter

Motor meter can be known as power meter. Energy is the entire power consumed over a period of time and it may be measured by a motor meter or energy meter. Furthermore, energy meters are utilized in all power provide traces to each home with a view to measure the power consumed in each DC and AC circuits. Energy meter is an instrument that measures the quantity of electrical power utilized by a client. The meter is calibrated in kilowatthours. One kilowatt-hour is the quantity of electrical power required to offer 1,000 watts of energy for a interval of 1 hour.

There’s an aluminum disc which rotates repeatedly when power is consumed. Energy meters have a pressure coil and a current coil. When the voltage is utilized throughout the pressure coil, current flows through the coil and produces a flux which exerts torque on the disc. The resultant torque acts on the disc and ends in a rotation on the aluminum disc which is proportional to the energy utilized and which is recorded within the energy meter.

## Examples Electrical Circuits – Multimeter Circuit

A multimeter is a black field of electronic circuitry that lets you troubleshoot nearly any kind {of electrical} wiring or device. With all its numbers, dials and switches, a multimeter (also called a volt-ohm meter, or VOM) might be fairly intimidating.

VOM pays for itself rapidly by simply analyzing whether the handfuls of batteries devoured by toys and electronic devices are nonetheless good. VOM consists of a galvanometer related in series with a resistance. The current circulation in a circuit, that’s, voltage throughout the circuit might be measured by connecting the terminals of the multimeter throughout the circuit. A multimeter is a helpful instrument that you simply use to measure electrical energy, identical to you’ll use a ruler to measure distance, a stopwatch to measure time, or a scale to measure weight.

## Examples Electrical Circuits – Current Transformer Circuit

The current transformer is a sort of “instrument transformer” aiming to supply an alternating current in its secondary winding which is proportional to the current being measured in its primary. Current transformers can reduce or “step- down” current levels from hundreds of amperes down to an ordinary output of a known ratio to both 5 Amps or 1 Amp for normal operation.

The secondary winding of the transformer is connected to an ammeter. The transformer will step down the current to a value that may be measured by the connected ammeter. Current transformers can carry out circuit control, measure current for power measurement and control, and carry out roles for security safety and present limiting. They will additionally trigger circuit events to happen when the monitored current reaches a specified level.

## Examples Electrical Circuits – Single Phase Motor Circuit

Single-phase distribution is used when loads are largely lighting and heating, with few massive electrical motors. Single-phase motors are designed to function from a single phase supply and might carry out all kinds of helpful providers nevertheless, they want further circuits for starting, and such motors are unusual above 10 or 20 kW in rating. A single phase motor has two terminals within the terminal box of the outer casing. Certainly one of these terminals is linked with the reside wire of the power circuit and the opposite is connected with the neutral wire. electrical4u

When the electrical supply goes to the motor, the motor will run until the power supply is reduce. Even a fan works on this single phase motor. Typically the fan won’t begin after we switch it on. The reason being that the capacitor employed for making the one section motor self beginning shouldn’t be functioning. One of the best ways to solve this problem is to replace the capacitor.

ELECTRIC CIRCUITS TOPIC