Speed of Wave Motion A wave is a disturbance that moves along a medium from one end to the other. If one watches an ocean wave moving along the medium (the ocean water), one can observe that the crest of the wave is moving from one location to another over a given interval of time. The crest Read more about Speed of Wave Motion[…]
Ampere’s Circuital Law Ampere’s Circuital Law states the relationship between the current and the magnetic field created by it. This law says, the integral of magnetic field density (B) along an imaginary closed path is equal to the product of current enclosed by the path and permeability of the medium. . James Clerk Maxwell had derived that. It alternatively says, the integral of magnetic Read more about Ampere’s Circuital Law[…]
Lenz’s Law of Electromagnetic Induction Lenz’s law is named after the German scientist H. F. E. Lenz in 1834. Lenz’s law obeys Newton’s third law of motion (i.e. to every action there is always an equal and opposite reaction) and the conservation of energy (i.e. energy may neither be created nor destroyed and therefore the sum of all Read more about Lenz’s Law of Electromagnetic Induction[…]
Kirchhoff’s Laws In 1845, a German physicist, Gustav Kirchhoff developed a pair or set of rules or laws which deal with the conservation of current and energy within electrical circuits. These two rules are commonly known as Kirchhoff’s Circuit Laws with one of Kirchhoff’s laws dealing with the current flowing around a closed circuit, Kirchhoff’s Current Law, (KCL) while Read more about Kirchhoff’s Laws[…]
Diffraction The waves are travelling from more dense to a less dense medium. These are not stopped till these are reached at the end of the medium. The term reflection, diffraction and refraction are very similar to each other. Reflection is the process that includes the alteration in direction of waves when the wave is Read more about Diffraction[…]
Radioactivity An atom is made up of three fundamental subatomic particles protons, neutrons and electrons. Out of these three particles, protons and neutrons located at the centre of the atom as a hard and dense part known as nucleus. The rest of the part of atom contains negatively charged particles called as electron which balance out the Read more about Radioactivity[…]
Ohm’s Law The electricity is the flow of charges from positive to negative or vice – versa. It is also said the flow of electrons. The one of important law of electricity is Ohm’s law. This is also called a fundamental law of electricity. It gives the relationship between basic electrical quantities. These basic quantities Read more about Ohm’s Law[…]
Photo Electric Effect Photoelectric effect or photoelectric emission is a phenomenon where electrons are ejected from the surface of a metal upon shining light on it. Energy which is contained within the light of incidence is getting absorbed by electron particles within the metal which escape the metallic surface given enough energy. The photoelectric effect Read more about Photo Electric Effect[…]
Limitations of Ohm’s Law In the year 1820 a French physicist, Andre Ampere made many discoveries on the nature of electricity. While a German physicist, Georg Ohm showed that the flow of an electric current through a wire depended on its ‘resistance’ and the potential difference between its ends. Ohm’s law is not a fundamental Read more about Limitations of Ohm’s Law[…]
AC Voltage Source Applied Across a Capacitor The purpose of a capacitor is to store energy in the form of an electrical charge, on its plates. When a capacitor is connected across a DC supply voltage it charges up to the value of the applied voltage at a rate determined by its time constant. We Read more about AC Voltage Source Applied Across a Capacitor[…]