Mir We have discussed the origin and definition of magnetic field. A bar magnet, a current-carrying wire and a moving charge are the origins of magnetic field. Then we learned to find the direction of magnetic field in another article. Now, how to find the magnitude or value of the magnetic field? Biot-Savart law of magnetostatics … Read more
In modern technology, Semiconductor materials have a huge role. Almost all high-speed electronic devices are made of semiconductors. One cannot use a pure semiconductor material to construct those devices. Impure atoms are doped in semiconductors before using them. In this article, we’re going to discuss exactly why we need doping in a semiconductor. What is … Read more
A semiconductor has two types of charge carriers – free electrons and holes. The motion of electrons in a conductor is well-known to us. One can expect almost a similar motion of electrons in a semiconductor too. But, how do holes move in a semiconductor? In this article, we’re going to discuss what is a … Read more
We already know that the Ohm’s law is a fundamental law in current electricity. Scientist Kirchhoff has given another two fundamental rules of electricity. With the help of these two rules one can easily find the current, voltage and resistance in an electrical circuit by using nodal analysis and loop analysis methods. In this article, … Read more
There are two basic laws of current electricity – one is Ohm’s law and another one is Kirchhoff’s law. Ohm’s law of current electricity gives the simplest relation between the electric current and voltage across a resistance. Kirchhoff’s laws tell us how to calculate electric current and voltage at a junction point or in a … Read more
Scientist Oersted observed that a current carrying wire produces magnetic field around it. One can find the magnitude of the magnetic field by using Biot-Savart law and Ampere’s circuital law. The direction of the magnetic field can be found by using Fleming’s right hand Thumb rule and Maxwell’s corkscrew rule. Have you ever wondered if … Read more
The internal logic design of a Computer is known as the architecture of the Computer. It consists of a CPU or Microprocessor, Input devices, Output devices and Memory. Computers work according to commands. While working, computer stores data in its memory. The storage of a Computer is not a single cell in its architecture. In … Read more
An electric charge can produce an electric field around it inside which it interacts with other charges. This interaction is nothing but the exertion of forces on the charges. This force between the electric charges is known as the Electrostatic Force. Coulomb’s law of electrostatics gives an equation for the electrostatic force between the charges. … Read more
Electric charges can be distributed along the length, over the surface and in the volume of a conductor. The density of electric charge refers to the amount of charges per unit dimension. There are three types of charge densities of a conductor. The Linear charge density and Volume charge density have been discussed in other … Read more
XOR gate or Exclusive OR gate is a widely used logic gate in digital electronics that is available in IC form. XOR gate can be constructed using basic logic gates, NAND gates and NOR gates separately. Again, there can be different combinations in the same group of design. We discussed basic logic gates like OR … Read more