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

Both the PN junction diode and the Zener diode are semiconductor devices that are extensively used in various electronic circuits. A PN junction diode is mainly used for rectification (transforming AC into DC), while a Zener diode is used for voltage regulation in the electronic circuits.There are a number of ... Read More

A magnet is a material or object which has ability to produce a magnetic field and can attract or repel other ferromagnetic materials. Based on the method of production of magnetic field, the magnets are classified into two types viz. −Permanent magnetElectromagnetThe main difference between an electromagnet and a permanent ... Read More

Voltage and current are the two fundamental electrical quantities. The voltage is the factor in an electric circuit which causes electric current to flow in the circuit. The magnitude of the voltage and current depend upon each other. However, there are several differences between voltage and current which are described ... Read More

Welding and soldering are widely used in the fabrication industry. Both welding and soldering are used for joining metallic parts by the application of heat. In this article, we will compare welding and soldering by considering various factors like metaling temperature, heat source, use of flux, deformation, etc. But, before ... Read More

The electric power supply we use in our day-to-day life is of AC or alternating current power supply. The alternating current or AC supply is the type of electric power supply in which the magnitude of the electric current changes continuously with time and the direction changes periodically. Almost 90% ... Read More

The interruption in the supply of electricity has increased drastically over the years due to increased demand and it influenced the electricity industry. To overcome the problem of irregularities in the electricity supply, two of the most common technologies viz. generator and inverter of electric power supply are used. The ... Read More