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measures electrical power (energy consumed)
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terms list
watt
measures electrical power (energy consumed)
ampere
measures electrical current (strength)
volt
measures electrical pressure
ohm
measures electrical resistance
hertz
measures frequency of alternating current
short circuit
a circuit with no resistance
ohm's law
the relationship between voltage, amperage and resistance
amperes = volts / ohms
ohm's law (write it out)
ohms = volts / amperes
find ohms from volts and amperes
volts = amperes * ohms
find volts from amperes and ohms
amperes = volts / ohms
find amperes from volts and ohms
law of electric power
law dictating the amount of power consumed by a device
watts = volts * amperes
law of electric power (write it out)
step-up transformer
two electromagnets that increase the voltage of the current
step-down transformer
two electromagnets that decrease the voltage of the current
generator
device that changes kinetic into electric energy
motor
device that changes electric into kinetic energy
rotor
a spinning electromagnet
stator
a stationary magnet
capacitor
a device that briefly contains electricity
resistor
a device that creates resistance to the flow of electrons
transformer
a device that changes voltage and amperage of a current
series circuit
a circuit where all moving electrons pass through every part of the circuit
parallel circuit
a circuit where the voltage is the same at all points in the circuit
total resistance
added resistance of all points in the circuit
series-parallel circuit
combination of the two basic circuit types
dopants
chemical that determines whether silicon will be an insulator or a conductor
transistor
devices that can switch a current, regulate its flow or amplify a current
diode
devices that allow a current to travel in only one direction
rectifiers
devices that transform AC into DC
12
gauge wire needed for 20-ampere circuit
14
gauge wire needed for 15 ampere circuit
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