A unit of measurement can be defined as a quantity chosen as a standard in terms of which other quantities may be expressed.Engineering is an applied science dealing with a variety of physical quantities (a physical quantity is one which can be measured) like time, speed, voltage, resistance etc. Hence, ... Read More

A band pass filter (BPF) is a circuit that passes frequencies within a certain range and rejects all the frequencies outside the range. This range of band pass filter is known as Bandwidth of the filter.The Bandwidth of band pass filter is given by, $$Bandwidth=f_{high}-f_{low}$$Where, fhigh and flow are the ... Read More

An electrodynamometer or simply Dynamometer wattmeter is an instrument that is universally used for the measurement of DC as well as AC electric power.It works on the principle of dynamometer i.e. a mechanical force acts between two current carrying conductors.Construction of ElectrodynamometerThe electrodynamometer wattmeter has a fixed coil divided into ... Read More

A magnet whose magnetic field is created by an electric current is known as Electromagnet. An electromagnet consists of a soft iron core wound with a coil of conductor wires.When a direct electric current is passed through the coil of the electromagnet a magnetic field is created around it. Since ... Read More

To understand the transient response of the first order system, consider the block diagram of a closed loop system with unity negative feedback.The open loop gain G(s) of the system with unity negative feedback is given by, $$G(s)=\frac{1}{s\tau}$$And the closed loop transfer function of the system with unity negative feedback ... Read More

The static electricity is the result of an imbalance between the positive and negative charges of an object.To understand the phenomena of static electricity, first we need to understand the basics of atoms and charges.The Structure of AtomAll the physical objects are made up of atoms. The atoms in turn ... Read More

The Bode Plot is the frequency response plot of linear systems represented in the form of logarithmic plots. In bode plot the horizontal axis represents frequency on a logarithmic scale and the vertical axis represents either the amplitude or the phase of the frequency response function.Low Pass Filter Bode PlotThe ... Read More

The space or field in which a magnetic pole experiences a force is called as a magnetic field. The magnetic field can be produced either by moving the charge or some magnetic material. During the beginning of 19th century, a scientist named H. C. Oersted discovered that when current flows ... Read More

The directed flow of charge (free electrons) is called electric current. In other words, the electric current is defined as the rate of flow charge (free electrons). It is represented by 𝐼 or 𝑖 and measured in Amperes (A). i.e.$$I=\frac{Q}{t}=\frac{ne}{t}\:\:Ampere(A)$$Where, Q = ne, and e = 1.6 X 10-19 C.In ... Read More

Electrical Circuit Devices are essential components of electrical and electronic circuits. There are several devices that are present in electrical and electronic circuits. Some important circuit devices are as follows −SourcesSwitchesConnectorsCircuit Protection DevicesLoadsSourcesA source of electrical energy is a device that delivers energy into a system. These devices create potential ... Read More