Physics

Geomagnetic Storm Definition Geomagnetic storm is a disturbance in the magnetosphere due to near-Earth space weather that happens when the interplanetary magnetic field turns southward…

Solar Flare Definition Solar Flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. On the Sun’s surface are…

Aurora Definition Aurora is a luminous phenomenon that consists of streamers or arches of light appearing in the upper atmosphere of a planet’s magnetic Polar…

Hall Effect Definition Hall Effect is a direct result of Lorentz forces acting on the charges in the current, and is named after U.S. physicist…

Galvanometer Definition Galvanometer is an instrument to detect the presence of current through a circuit. It consists of a permanent magnet and coil. Current passes…

Magnetic Circuit Definition A magnetic circuit is made up of magnetic materials having high permeability such as iron, soft steel, etc. It is the closed…

Electric Potential Definition Electric Potential is the ‘push’ of electricity through a circuit. It’s easy to confuse electric potential with electric current, so it helps…

Magnetic Potential Definition Magnetic Potential is the property of certain substances or phenomena that gives rise to magnetic fields. Magnetic Potential, also known as Magnetomotive…

Field Line Definition Field Line is a line (line of force), which is used to indicate the direction of a field, especially an electric or…

Electrostatics Definition Electrostatics is the study of electromagnetic phenomena that occur when there are no moving charges—i.e., after a static equilibrium has been established and…

About Photon Definition A photon (also called light quantum) is the quantum of electromagnetic radiation. The term quantum is the smallest elemental unit of a…

Cavity Magnetron Definition Cavity Magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field…