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

In an electric circuit, the rate at which the work is being done (or the energy is being expended) is known as electric power. Mathematically, electric power can be defined as the work done (or energy expended) per unit time, i.e., $$\mathrm{Power, \mathit{P}\:=\:\frac{Work\:done\:(\mathit{W})}{Time(\mathit{t})}}$$The unit of electric power is Joules per ... Read More

Ammeter and galvanometer are both measuring instruments used to measure the current flowing through a circuit. The most significant difference between a galvanometer and an ammeter is that the ammeter measures only the magnitude of the current flowing in the circuit, while the galvanometer shows both magnitude and direction of ... Read More

The Magnetomotive force (MMF) in a magnetic circuit is analogous to the electromotive force (EMF) in an electric circuit. MMF is the factor responsible for driving the magnetic flux in a magnetic core, while the electromotive force EMF is the factor responsible for the flow of electric charge (or electrons) ... Read More

There are two important devices viz. UPS and inverter that are used extensively to provide backup supply to the electrical systems. As we know, today electricity has become a necessity because almost all of our day-to-day activities require electricity. Since, all the device such as mobiles, laptops, PCs, washing machines, ... Read More