In fact, the term “parallel” can be misleading. It is important to understand that the criterion of shared voltage, meaning connection between the same two nodes, is the only reliable way to identify parallel resistors. Rather, it is the fundamental characteristic of parallel resistors: if resistors are connected between the same two nodes, the voltage across each resistor is the same, and the resistors are in parallel. The voltage relationship described above is not merely an interesting characteristic associated with parallel resistors. \ Parallel Resistance Equationīefore moving on, you can check out AAC's parallel resistance calculator for more information on parallel resistance. Thus, we say that the voltage across each resistor is the same: This means that the two upper terminals have the same voltage, namely, the node voltage V A, and that the two lower terminals have the same voltage, namely, the node voltage V B. The upper terminal of R 1 and the upper terminal of R 2 are connected together by an idealized wire that has zero resistance, and the two lower terminals are connected together in the same way. We say that resistors are in parallel when the terminals of one resistor are connected to the same two nodes as the terminals of another resistor. One of the two most important resistor configurations is called parallel. The many sources of resistance that influence the operation of a circuit can combine in various ways. Understanding resistance is an essential step toward understanding electronics. Resistance is everywhere-for example, in conductive wires and traces, integrated-circuit pins, and terminals attached to capacitors and inductors. Furthermore, intentionally installed resistors are not the only source of resistance that we need to account for when we’re designing and analyzing a circuit. ![]() ![]() Resistors are fundamental electrical components that are found in all types of electrical systems.
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