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The alternating current creates an alternating magnetic field across the transformer. A magnetic field develops in the iron core of the transformer. This causes a potential difference to be induced acr...

Electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions. Fluorine has a negative value as energy is released when the electron i...

Whereas faults have relative movement, joints have no movement. This means that although faults show displacement (such as displaced bedding), joints show no displacement. 

Earthquakes occur when the stored stress in the rock exceeds its strength. Energy is released as the rocks fractures and moves in the form of seismic waves. The energy released causes vibrations creati...

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell.

Red blood ...