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A+ chapter 8 historical / conceptual
Terms in this set (11)
_____ is a flow of negatively charged electrons through matter.
Like water in a pipe, the pressure of electrons inside a wire in a wall socket is called _____ and is measured in units called volts.
_____ are the units of measure for voltage in a wire. It is a unit of electrical potential (pressure ).
current or amperage
The amount of electrons moving past a certain point on a wire is called the _____. Which is measured in units called amperes (amps or A). The amount of amps and volts a device will need is expressed as how much wattage (watts or W) the device needs. (volume flowing)
The amount of amps and volts needed to power a device is known as the _____. It is Volts x Amps. (work)
Wires of all types have a slight _____ to the flow of electrons, just like water pipes have a slight amount of friction that resists the flow of water. _____ to the flow of electrons is measured in ohms (Omega)
Resistance to the flow of electrons in a wire is measured in _____. (resistance)
note. Amperage rating is not to be exceeded in a wire because a wire can only handle so much current at a time, pushing too much through will cause a wire to overheat and break.
Electricity note. There are 2 types, direct current DC and alternating current AC.
Direct current (DC)
_____ is a type of electricity in which the electrons flow in one direction around a continuous circuit. most electronic devices use this type of power.
Alternating Current (AC)
_____ is a type of electricity in which the flow of electrons alternates direction back and forth in a circuit. Power companies supply this because it travels long distances more efficiently than its counterpart.
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