Coulomb’s Law The study of electrostatics begins with the Coulomb’s law. It is an experimental law published in 1785 by French physicist Charles Augustin de Coulomb. This law is very important for the development of theory of electromagnetism. Charles Coulomb observed that when two electric charges are placed close to each other, they experience a force. He Read more about Coulomb’s Law[…]
Buoyancy When a body is in water, it displaces some amount of water owing to its weight. The amount of displaced water is computed by object’s density which relates to volume. The volume of a cricket ball and beach ball can be same their different weight their density differs. The steel solid block descends in Read more about Buoyancy[…]
Magnetization and Magnetic Intensity The Magnetic behaviour of a magnet is characterized by the alignment of the atoms inside a substance. When a ferromagnetic substance is brought under the application of a strong external magnetic field, then they experience a torque wherein the substance aligns themselves in the direction of the magnetic field applied and hence gets strongly magnetized Read more about Magnetization and Magnetic Intensity[…]
Standing Waves in Air Columns Air Columns: Air Column can be found in various musical instruments where it is enclosed with a hollow metal tube. To conserve space it is coiled upon itself several times. It is almost nearer to one meter in length. Suppose if the end of the tube is left uncovered and Read more about Standing Waves in Air Columns[…]
Brewster’s Law Brewster’s law is a relationship of light waves at the maximum polarization angle of light. This law is named after Sir David Brewster, a Scottish physicist, who proposed the law in the year 1811. The law states that the p-polarized rays vanish completely on different glasses at a particular angle. Further, the polarization angle Read more about Brewster’s Law[…]
Transformers A transformer is an electrical device used to change the value of an alternating voltage. Transformers are widely used in electrical work. They are encountered daily, in industrial, Commercial and domestic situations. They vary in size from miniature units used in electronics to huge units used in power stations. The efficient transmission and distribution Read more about Transformers[…]
Transistor A transistor is a semiconductor device which is used to switch or amplify electronic signals and electric power. It consists of semiconductor material mostly with at least three terminals for connection to an external circuit. Transistor working principle: Transistors are made up of three parts namely a base, a collector and an emitter. The base serves Read more about Transistor[…]
Bandwidth of a Signal What is Bandwidth of a Signal? Bandwidth is a range of frequencies within a continuous set of frequencies. It is measured in Hertz. The purpose of a communication system is to transfer information from the transmitter which is located at one place to a receiver which is usually far away from Read more about Bandwidth of a Signal[…]
Total Internal Reflection Total Internal Reflection is a scenario where a travelling wave of light strikes a boundary of a medium but at an angle that is larger than critical angle. So, the concept behind is that if the refractive index on the other side of the boundary of the medium is lower, and the light wave Read more about Total Internal Reflection[…]
Resistors in Series and Parallel In an electric circuit, the different components can be connected either in series or in parallel to produce different resistive networks. Sometimes, in the same circuit, resistors can be connected in parallel and series, across different loops to produce a more complex resistive network. In the end, however, the total Read more about Resistors in Series and Parallel[…]