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Parallel resistance is illustrated by the circulatory system. Each organ is supplied by an artery that branches off the aorta. The total resistance of this parallel arrangement is expressed by the following equation: 1/R total = 1/R a + 1/R b + ... + 1/R n. R a, R b, and R n are the resistances of the renal, hepatic, and other arteries ...
Various resistor types of different shapes and sizes. A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components ...
Electric current is the flow of electric charge. Material is needed through which charges can flow. Materials that oppose or resist the flow of charge are called "resistors". Such materials affer alectrical resistance.
Series and parallel topologies can continue to be constructed with greater and greater numbers of branches ad infinitum. The number of unique topologies that can be obtained from n ∈ N {\displaystyle n\in \mathbb {N} } series or parallel branches is 1, 2, 4, 10, 24, 66, 180, 522, 1532, 4624, … {\displaystyle \dots } (sequence A000084 in the ...
Parallel RC circuit. The parallel RC circuit is generally of less interest than the series circuit. This is largely because the output voltage V out is equal to the input voltage V in — as a result, this circuit does not act as a filter on the input signal unless fed by a current source. With complex impedances:
[nb 1] Also, the E192 series is used for 0.25% and 0.1% tolerance resistors. Historically, the E series is split into two major groupings: E3, E6, E12, E24 are subsets of E24. Values in this group are rounded to 2 significant figures. E48, E96, E192 are subsets of E192. Values in this group are rounded to 3 significant figures.
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