WikiVisually
Infinite photos and videos for every Wiki article · Find something interesting to watch in seconds
WikiVisually
Infinite photos and videos for every Wiki article · Find something interesting to watch in seconds
Nature The World Movies USA Top Art Fine & Rare History Ivy & Inquiry
Electromotive force
Videos
In electromagnetism and electronics, electromotive force is an energy transfer to an electric circuit per unit of electric charge, measured in volts. Devices called electrical transducers provide an emf by converting other forms of energy into electrical energy. Other electrical equipment also produce an emf, such as batteries, which convert chemical energy, and generators, which convert mechanical energy. This energy conversion is achieved by physical forces applying physical work on electric charges. However, electromotive force itself is not a physical force, and ISO/IEC standards have deprecated the term in favor of source voltage or source tension instead.
A typical reaction path requires the initial reactants to cross an energy barrier, enter an intermediate state and finally emerge in a lower energy co
A typical reaction path requires the initial reactants to cross an energy barrier, enter an intermediate state and finally emerge in a lower energy configuration. If charge separation is involved, this energy difference can result in an emf. See Bergmann et al. and Transition state.
Solar cell output voltage for two light-induced currents IL expressed as a ratio to the reverse saturation current I0 and using a fixed ideality facto
Solar cell output voltage for two light-induced currents IL expressed as a ratio to the reverse saturation current I0 and using a fixed ideality factor m of 2. Their emf is the voltage at their y-axis intercept.
Geomagnetic storm
Videos
A geomagnetic storm, also known as a magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave.
Artist's depiction of solar wind particles interacting with Earth's magnetosphere. Sizes are not to scale.
Artist's depiction of solar wind particles interacting with Earth's magnetosphere. Sizes are not to scale.
Aurora borealis
Aurora borealis
GOES-7 monitors space weather conditions during the Great Geomagnetic storm of March 1989. The Moscow neutron monitor recorded the passage of a CME as
GOES-7 monitors space weather conditions during the Great Geomagnetic storm of March 1989. The Moscow neutron monitor recorded the passage of a CME as a drop in levels known as a Forbush decrease.