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) in an electric circuit.What is Electromotive Force (EMF)?The total amount of energy given to a unit charge by a source of energy such as generator, battery, etc. is known as electromotive force (or EMF) of the energy source. As the electromotive force has “force” in its name but technically, the ... Read More

There is a property of space which is caused by the motion of the electric charge, is known as electromagnetic field. There are two component of an electromagnetic field viz. −Electric fieldMagnetic fieldA stationary electric charge produces only an electric field in the surrounding space. If the electric charge is moving, then it also produces a magnetic field. The electric field and magnetic field occupy different planes relative to the cause of the electromagnetic field, i.e., moving charge.Therefore, one of the major difference between electric field and the magnetic field is that the electric field produces around a static electric ... Read More

In electrical and electronics engineering, regulating and controlling of the electric power delivered to the load is very important to reduce the wastage of electrical energy. This can be achieved by using DIAC and TRIAC which are two different types of power semiconductor devices.DIAC and TRIAC are used to control the AC power supplied to the load. Both DIAC and TRIAC can operate at high voltages and currents. Both these devices belong to the thyristor family, having p-n-p-n structure. But, DIAC and TRIAC are also different from each other in many ways. Read through this article to find out the ... Read More

Both conduction and convection are modes of heat transfer from one system to another. When there is a difference in the temperature of two systems, then the transfer of heat takes place from the system of higher temperature to the system of lower temperature.In practice, this transfer of heat takes place in three different modes viz. conduction, convection and radiation. But, in this article, we will only discuss about conduction and convection and how they are different from each other.What is Conduction of Heat?When the transfer of heat takes place from one part of the substance to another part without ... Read More

Both Battery and Capacitor seem to be similar in the first glance because they store and release the electric energy, but there are many differences between them which we are going to highlight in this article.One of the most significant differences between a battery and a capacitor is that a battery stores electrical energy in the form of chemical energy and again converts it into electrical energy when required, while a capacitor stores electrical energy in the form of electrostatic field.What is a Battery?A battery is a device which is used as the source of energy in electrical and electronic ... Read More

A multimeter is a multipurpose electronic measuring instrument extensively used by professionals to determine the faults in a circuit. A typical multimeter can be used to measure various electrical quantities such as voltage, current, resistance, transistor gain, etc.Based on the design and method used for the measurement, multimeters are classified into two types −Analog Multimeter (AMM)Digital Multimeter (DMM)The various differences between an analog multimeter and a digital multimeter are shown in the table below. We have also included a brief description on analog and digital multimeters.What is an Analog Multimeter?An analog multimeter is a type of multimeter which displays the ... Read More

Both Ammeter and Voltmeter are electrical measuring instruments used for measuring the current and voltage in an electrical circuit, respectively. Read through this article to find out more about Ammeter and Voltmeter and how they are different from each other. Before getting into the differences between Ammeters and Voltmeters, let's get some basic information about these two devices. What is an Ammeter? An electrical measuring instrument that is used to measure electric current in an electric circuit is known as ammeter. As the measurement unit of electric current is ampere and this instrument is used to measure the ... Read More

The rate of work done in an electric circuit is known as electric power. In an electric circuit, there are three types of electric powers viz. active power, reactive power and apparent power. In this article, we will discuss the major differences between active power and reactive power. What is Active Power? In an AC or DC electric circuit, the amount of electric power which is utilized and consumed in doing a work is called active power. Active power is also known as real power or true power. Active power is usually represented by the letter ‘P’ and is ... Read More

LED lamps consume less energy as compared to Halogen lamps. LED lamps are cost efficient too. Read through this article to find out the major differnces between LEDs and Halogen lamps and how they function.What is LED Lamp?An electric lamp which produces light by using light emitting diodes or LEDs is known as an LED lamp or LED light bulb. An LED lamp works on the principle of electroluminescence, i.e. it emits the light due to the interaction of an electric field with a suitable solid.Basically, an LED is a specially doped PN junction diode which is made of special ... Read More

Various Systems of Power TransmissionFor the transmission of electrical power from the generating stations to the substations for distribution, there are various types of power transmission systems are adopted. However, for the transmission of electric power, three-phase three wire transmission system is universally adopted.The different possible systems for electric power transmission are discussed below.DC Transmission SystemWhen the electrical power is transmitted using direct current or voltage, then the transmission system is called the DC transmission system. The transmission system can be further classified into following three types −DC Two-Wire SystemDC Two-Wire with Mid-Point EarthedDC Three-Wire SystemSingle Phase AC SystemWhen the ... Read More