An electrical machine that is used for the conversion of electrical energy into mechanical energy is known as electric motor. Based on the type of electric supply input, the electric motors are of two types − AC motor and DC motor. An AC motor is the one which takes alternating ... Read More

In the field of engineering, those devices which are used for performing measurement of various quantities such as voltage, current, speed, resistance, energy, power, etc., are known as measuring instruments.These measuring instruments are classified into two main types based on their construction, working and method of showing output −Analog InstrumentsDigital ... Read More

Electronics is the branch of engineering which deals with the study of devices that function due to the movement of electrons. Based on types of signals used and voltage or current or power ratings, the electronics can be broadly classified into following categories viz.Analog ElectronicsDigital ElectronicsPower ElectronicsIn this post, we ... Read More

In electrical and electronics engineering, the communication is defined as the process of broadcasting, transmitting, storing or viewing the data and information using electronic devices and circuits.Based on the nature of signals and devices used for processing the information, the electronic communication can be classified into following two types −Analog ... Read More

In electronics engineering, a number of semiconductor switching devices are there such as diode, transistor, SCR, GTO, IGBT, etc. The BJT and UJT both are the types of transistors used for switching application in different electronic circuits.Since both UJT and BJT are the transistors, however, there are many differences between ... Read More

Potentiometer and voltmeter are both types of measuring devices used to measure the voltage. However, one most significant difference between the potentiometer and the voltmeter is that the potentiometer is used for measuring the EMF of a source while the voltmeter is used to measure the potential difference (or voltage) ... Read More

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