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alternating current
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Alternating Current
Electric current that flows for an interval of time in one direction and then in the opposite direction; that is, a current that flows in alternately reversed directions through or around a circuit. Electric energy is usually generated as alternating current in a power station, and alternating currents may be used for both power and lighting.
The advantage of alternating current over direct current (DC), as from a battery, is that its voltage can be raised or lowered economically by a transformer; high voltage for generation and transmission, and low voltage for safe utilization. Railways, factories, and domestic appliances, for example, use alternating current.
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alternating current
ammeter
ampere
amplifier
battery
capacitor
cell, electrical
circuit (physics)
circuit breaker
diode
direct current
dynamo
earth
earth leakage circuit breaker
electric current
electric power
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electromotive force
electronics
farad
fuse
generator
insulator
integrated circuit
kilowatt
kilowatt-hour
lamp, electric
LCD
light-dependent resistor
light-emitting diode
liquid-crystal display
logic gate
mains electricity
national grid
ohm
Ohm's law
operational amplifier
parallel circuit
plug, three-pin
power rating
power station
power transmission
printed circuit board
rectifier
relay
residual current device
resistance
resistor
semiconductor
series circuit
switch
thermistor
thyristor
timer circuit
transformer
transistor
volt
voltage
voltmeter
watt
ammeter
ampere
amplifier
battery
capacitor
cell, electrical
circuit (physics)
circuit breaker
diode
direct current
dynamo
earth
earth leakage circuit breaker
electric current
electric power
electrical safety
electricity
electromotive force
electronics
farad
fuse
generator
insulator
integrated circuit
kilowatt
kilowatt-hour
lamp, electric
LCD
light-dependent resistor
light-emitting diode
liquid-crystal display
logic gate
mains electricity
national grid
ohm
Ohm's law
operational amplifier
parallel circuit
plug, three-pin
power rating
power station
power transmission
printed circuit board
rectifier
relay
residual current device
resistance
resistor
semiconductor
series circuit
switch
thermistor
thyristor
timer circuit
transformer
transistor
volt
voltage
voltmeter
watt
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