A switch is the most common device used in everyday life for turning on and off the electrical appliances. A switch can make or break a circuit. The electric current can flow in a circuit till the switch is in ON state. The switches are commonly used to turn on ... Read More

In electrical power system, various devices are used to ensure the safe operation of electrical equipment. The most important set of these devices that helps to ensure this safety is switchgears. Amongst these switchgears, the circuit breakers and isolators are commonly used in every electrical power system. These two devices ... Read More

An electric circuit is the interconnection of circuit elements which carries the electric power from the source to the load. Sometimes, the electric power (or voltage or current) in the circuit may increase suddenly, which cause damages of the load or other devices in the circuit. Therefore, in order to ... Read More

Contactor and relay are both electromagnetic switches that are designed to provide switching and controlling functions in the electric circuits. The primary function of both relay and contactor is similar, but there are many differences between them that are listed in the table below.The major difference between these two devices ... Read More

In electrical engineering, a transformer is a static electrical machine which is employed for transforming the level of alternating voltage, i.e. for stepping-up and stepping down the voltage, for transmitting the electric power from generating station to utility points.The transformer changes the level of alternating voltage without changing its frequency. ... Read More

In electric circuits, resistance (or resistor) is one of the elementary component. The resistors are connected in different fashion in an electric circuit, such as series,  parallel and series-parallel, etc.This article is meant for explaining the differences between combination of resistances in series and parallel. Also, we have briefly explained ... Read More

Resistance and resistivity are the major terms associated with the opposition in the flow of electric current in a circuit. The most significant difference between resistance and resistivity is that resistance is the measure of opposition offered by the material in the path of electric current, whereas resistivity is the ... Read More

Both multimeter and clamp meter are types of electronic measuring and testing instruments used to measure different types electrical quantities such as current, voltage, resistance, etc. However, these two devices test different electrical measurements. It is difficult to find out which instrument to choose for a specific measurement, especially if ... Read More

Converter and inverter are both two important power-electronic devices in the field of electrical and electronics engineering. Inverters and converters are used for the conversion of AC power into DC power and vice-versa which is a very important phenomenon in the field power electronic engineering as well as in our ... Read More

The electronic circuit which is used to convert alternating current (AC) into direct current (DC) is known as a rectifier. The process of converting the alternating current into direct current is called rectification. The main component of the rectifier which performs the rectification is the semiconductor diode.Depending upon the type ... Read More