Electricity & Lighting online experts, Electricity & Lighting experts advice live, Electricity & Lighting live experts, Electricity & Lighting online help
What is the Electricity?
Electricity is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena such as lightning and static electricity, but in addition, less familiar concepts such as the electromagnetic field and electromagnetic induction.
In general usage, the word 'electricity' is adequate to refer to a number of physical effects. However, in scientific usage, the term is vague, and these related, but distinct, concepts are better identified by more precise terms:
- Electric charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields.
- Electric field: an influence produced by an electric charge on other charges in its vicinity.
- Electric potential: the capacity of an electric field to do work, typically measured in volts
- Electromagnetism: a fundamental interaction between the magnetic field and the presence and motion of an electric charge
What is the Lighting?
Lighting includes both artificial light sources such as lamps and natural illumination of interiors from daylight. Daylighting (trough windows, skylights, etc.) is often used as the main source of light during daytime in buildings given its low cost. Lighting represents a major component of energy consumption, accounting for a significant part of all energy consumed worldwide. Artificial lighting is most commonly provided today by electric lights, but gas lighting, candles, or oil lamps were used in the past, and still are used in certain situations. Proper lighting can enhance task performance or aesthetics, while there can be energy wastage and adverse health effects of lighting. Indoor lighting is a form of fixture or furnishing, and a key part of interior design. Lighting can also be an intrinsic component of landscaping
Electricity & Lighting online experts, Electricity & Lighting experts advice live, Electricity & Lighting live experts, Electricity & Lighting online help
