an electric current in which the direction of flow of the electrons reverses periodically having an average of zero, with positive and negative values (with a frequency of 50 Hz in Europe, 60 Hz in the US, 400 Hz for airport lighting, and some others); especially such a current produced by a rotating generator or alternator
A flow of electricity which reaches maximum in one direction, decreases to zero, then reverses itself and reaches maximum in the opposite direction The cycle is repeated continuously The number of cycles per second is equal to the frequency
A type of electrical current, the direction of which is reversed at regular intervals or cycles; in the U S the standard is 120 reversals or 60 cycles per second; typically abbreviated as AC
An electric current that reverses direction in a periodic manner Most electrical power systems generate ac with a frequency of 50 or 60 cycles per second See also polyphase AC
Electrical current which reverses direction regularly (60 hertz, or cycles per second, in the US) As opposed to DC or direct current which does not reverse direction
A type of electrical current in which the direction of the flow of electrons switches back and forth In the US, the current that comes from a wall outlet is alternating; it cycles back and forth sixty times each second The current that flows in a flashlight, on the other hand, is direct current (DC), which does not alternate
An electric current or voltage that reverses direction of flow periodically, as contrasted to direct current, and has alternately positive and negative values Most electricity used in the U S today is alternating current
(AC) An electrical current that reverse its polarity or direction of flow at regular intervals AC is usually represented by a sine wave In the US, domestic wall plugs provide AC at 60 hertz, or 60 cycles persecond
an electric flow that reverses its direction at regular recurring intervals Each forward-backward motion interval is called a cycle Electric current in the United States alternates with a frequency of 60 hertz or cycles per second (See direct current) [return to top]
(elec) An electric current that periodically reverses its direction The standard current used by utilities in the U S is 60 cycles per second; in Europe and other parts of the world it is 50 cycles per second Generally abbreviated as ac F - courant alternatif S - courriente continua
An electrical current that changes its direction of flow with a certain periodicity For example, 60-cycle AC is an electrical current that changes its direction of flow 60 times per second Also loosely used as a synonym for any current or field that varies with time
Abbreviation ac Electric current whose flow alternates in direction The number of times the current changes direction in one second is called the frequency The normal waveform of ac is sinusoidal
Electric current whose flow alternates in direction The number of times the current changes direction in one second is called the frequency The usual waveform of ac is sinusoidal
Electric current in which the direction of flow is reversed at frequent intervals--usually 100 or 120 times per second (50 or 60 cycles per second or 50//60 Hz)
An alternating current is an electric current that continually changes direction as it flows. The abbreviation AC is also used. AC a flow of electricity that changes direction regularly and quickly direct current. Flow of electric charge that reverses periodically, unlike direct current. It starts from zero, grows to a maximum, decreases to zero, reverses, reaches a maximum in the opposite direction, returns again to zero, and repeats the cycle indefinitely. The time taken to complete one cycle is called the period (see periodic motion), and the number of cycles per second is the frequency; the maximum value in either direction is the current's amplitude. Low frequencies (50-60 cycles per second) are used for domestic and commercial power, but frequencies of around 100 million cycles per second (100 megahertz) are used in television and of several thousand megahertz in radar and microwave communication. A major advantage of alternating current is that the voltage can be increased and decreased by a transformer for more efficient transmission over long distances. Direct current cannot use transformers to change voltage. See also electric current
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