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volt

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Volt


SI unit of electromotive force or electric potential (see potential, electric). A small battery has a potential of 1.5 volts, while a high-tension transmission line may carry up to 765,000 volts. The domestic electricity supply in the UK is 230 volts (lowered from 240 volts in 1995); it is 110 volts in the USA.

The absolute volt is defined as the potential difference (PD) necessary to produce a current of one ampere through an electric circuit with a resistance of one ohm. It can also be defined as the potential difference that requires one joule of work to move a positive charge of one coulomb from the lower to the higher potential. It is named after the Italian scientist Alessandro Volta.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
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alternating current
ammeter
amp
ampere
amplifier
battery
capacitor
cell, electrical
circuit (physics)
circuit breaker
conductor (chemistry)
conventional current
coulomb
diode
direct current
electric bell
electric charge
electric current
electric motor
electric power
electricity
electromotive force
electron flow
electronics
energy transfer
farad
generator
insulator
integrated circuit
lamp, electric
LCD
light bulb
light-dependent resistor
light-emitting diode
liquid-crystal display
logic gate
ohm
Ohm's law
operational amplifier
parallel circuit
potential difference
printed circuit board
rectifier
relay
resistance
resistor
semiconductor
series circuit
static electricity
switch
thermistor
thyristor
timer circuit
transistor
volt
voltage
voltmeter
watt

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