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8 Cards in this Set
- Front
- Back
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components designed to provide measured amounts of opposition to current
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resistors
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-oldest and most common type
constructed of a rod of compressed graphite and a binding material |
carbon composition fixed resistor
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-made by winding resistive wire on a porcelain base
-used to control large amounts of current -used when resistance accuracy is required |
wire-wound fixed
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-made by despositing a thin layer of resistive material onto a high-grade ceramic tube or rod
-resistance is established by the resistance of the film |
film fixed
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-developed in response to the demand for smaller electronic components
-no leads |
surface mount (SMT) fixed
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-taps allow different value to be selected
-power must be removed to change taps -it then becomes a fixed value |
tapped
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-used to control current
-sliding contact arm can be adjusted to vary the resistance, with power on -two connections |
variable (rheostat)
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-used to control voltage
-sliding contact arm can be adjusted to vary the resistance, with power on -three connections |
variable (potentiometer)
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