For example, the lighting wiring (bulb connections) in your house or any other building. There are many instances where resistors or ohmic devices introducing resistance to current flow appear in parallel in an electronic or electrical circuit. Therefore, we could say that the total parallel resistance is the equivalent resistance of a combination of all the resistances of individual resistors connected in a parallel configuration. Current through each resistor is calculated using Ohm’s law I = V/R eq, in which the voltage across each resistor is constant and R eq is the equivalent resistance of the parallel circuit.
Also, the sum of the individual currents through each resistor is equal to the current flowing into the parallel connection. However, resistors connected in parallel share the supplied current, which means that the currents flowing through each of the parallel resistors may be different depending on the individual resistances. In a parallel configuration, the potential drop(voltage) across each resistor is the same or rather it’s constant throughout the entire circuit. In a parallel circuit, all of the resistor’s leads on one end are connected together by a continuous wire of negligible resistance, and all the leads on the other side are also connected to one another using a continuous wire of negligible resistance. In this article, we will only focus on parallel resistor circuits as they are the most common.įigure 1: Resistors in a Parallel ConfigurationĪ parallel connection occurs when resistors are connected side by side (across each other), as shown in the diagram below.
PARALLEL RESISTANCE SERIES
In a series circuit, the supplied current is the same in each resistor as the output current of the 1st resistor flows into the input of the 2nd resistor and so on. The simplest resistor combinations in any electrical circuit are parallel and series connections. The equivalent resistance depends both on how the resistors are connected in the circuit and their individual resistance values. Whenever several resistors are connected together to a voltage source like a battery, the current supplied by the voltage source will depend on the equivalent resistance of the electrical circuit. Ohm’s law is expressed as: I = V/R, where I is the circuit current, V is circuit voltage and R is the overall resistance. The relationship between voltage, resistance, and current in an electrical circuit with resistors is given by Ohm’s Law. Most electrical circuits consist of more than one resistor. Insulators, on the other hand, are materials that present very high resistance to electrons flow examples are rubber, plastic, wood, and glass.īasically, a resistor is an ohmic device that limits the flow of current in a circuit. Conductors are materials that have very little resistance to electrons flow, they include aluminum, silver, gold, copper, and many more. Naturally, all materials oppose current flow to some extent, and they are classified as either conductors or insulators. It is measured in ohms and symbolized by (Ω)-a Greek letter omega.
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