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The abbreviations AC and DC are often used to mean simply alternating and direct, respectively, as when they modify current or voltage. [ 1 ] [ 2 ] The usual waveform of alternating current in most electric power circuits is a sine wave , whose positive half-period corresponds with positive direction of the current and vice versa (the full ...
Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2] It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids worldwide to transfer ...
Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air.
The concept of power dissipation in AC circuit is explained and illustrated with the example. For instance, a power factor of 0.68 means that only 68 percent of the total current supplied (in magnitude) is actually doing work; the remaining current does no work at the load. Power Factor is very important in Power sector substations.
The first residential AC was installed by 1914, and by the 1950s there was "widespread adoption of residential AC". [ 13 ] The invention of the components of HVAC systems went hand-in-hand with the Industrial Revolution , and new methods of modernization, higher efficiency, and system control are constantly being introduced by companies and ...
Mind map of top level disciplines and professions. An academic discipline or field of study is known as a branch of knowledge.It is taught as an accredited part of higher education.
A Certificate of Advanced Study (CAS), [1] also called an Advanced Certificate (AC), [2] [3] [4] Certificate of Advanced Graduate Study (CAGS), [5] or a Certificate of Advanced Professional Studies (CAPS), is a post-Master's academic certificate designed for professional and non traditional students, as well as practitioners who seek a continuing education program to enhance their professional ...
AC – The Danish Confederation of Professional Associations, an umbrella organisation for several Danish trade unions; AC Transit, a regional public transit agency in the San Francisco Bay Area; Ad Council Japan (AC Japan), an organization that distributes Japanese public service announcements; Athletics Canada, the governing body of athletics ...