Term
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Definition
movement of electrons (always from more negative to more positive)
[represented in this class by "e®"] |
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Term
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Definition
opposite of direction of electron flow (exactly the same in every other respect)
[represented in this class by "I®"] |
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Term
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Definition
| 1 Amp of current means that 6.25 X 1018 electrons have moved past a point in one second |
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Term
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Definition
| .001A is used more commonly than Amp, because an Amp is a very large amount of current |
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Term
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Definition
| Term used to designate electrical pressure or force that causes current to flow. Also known as "potential." |
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Term
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Definition
| The difference in voltage from one end of an electrical component or circuit to the other. Also called "voltage across". It is the amount of voltage "used up" by the component. When measuring, the two ends of the Voltmeter should be connected to either end of the component. |
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Term
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Definition
| The difference in voltage between the given point and Ground (GND). When measuring the red lead of the voltmeter should be connected to the point and the black lead to Ground. |
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Term
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Definition
a material that allows electrical current to flow through it
(copper and most metals are good conductors, so are you) |
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Term
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Definition
| a material that does not allow an electrical current to flow through it (plastic and air are both insulators) |
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Term
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Definition
| electron flow that moves in only one direction |
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Term
| A.C. (alternating current): |
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Definition
| electron flow that alternates between moving in one direction and then the other |
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Term
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Definition
| Most common form of A.C. A geometric waveform that oscillates periodically, and is defined by the function y = sin x. In other words, it is an s-shaped, smooth wave that oscillates above and below zero |
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Term
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Definition
| A way of describing an AC voltage. Simply the voltage at the highest point of the wave. |
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Term
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Definition
| A way of describing an AC voltage. The difference between the most positive point of the wave and the most negative point of the wae. In a sine wave, twice the VPK. |
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Term
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Definition
The most common way to describe an AC voltage. Relates the AC voltage to what a comparable DC voltage would be Vrms=0.707(Vpk)
Vpk=1.414(Vrms) |
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Term
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Definition
| Period is the time it takes for a single cycle of an AC wave to complete |
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Term
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Definition
Frequency is given in Hertz (Hz) which is the number of cylces that are completed per second.
Frequency = 1/period(given in seconds) |
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Term
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Definition
The physical length of the AC wave.
wavelength= Speed/Frequency (speed of sound is 1128 feet per second) |
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Term
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Definition
| electrons ALWAYS move from more negative to more positive |
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Term
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Definition
| ...have voltage without current, but not possible to have current without voltage |
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