#Three resistors circuit chart icircuit series

#Three resistors circuit chart icircuit series

The voltage Uac and Ubc can be obtained by using the resistor series voltage divider formula: When the reference direction of the voltage variable uk or us involved in the formula changes, a negative sign will appear in the formula.Īs shown in the Figure 3, find the voltage Uab when R=0Ω, 4Ω, 12Ω. The voltage division formula expresses that the voltage of a resistor is proportional to its resistance value, that is, when the resistance increases, the voltage also increases.Īccording to the voltage reference direction obtained by the above voltage divider circuit formula, it can be seen that it has nothing to do with the selection of the current reference direction. The resistor series voltage divider formula shows the relationship between the voltage of a certain resistor and the total voltage. Generally speaking, when N resistors are connected in series, the voltage on the Kth resistor can be calculated according to the following voltage division formula: Then substitute it into the Ohm's law of the resistance element, the voltage division formula for calculating the resistance voltage is obtained: Substituting the Ohm's law of the resistance element into the KVL equation, the calculation formula for the current i is obtained: The following equation is given by Kirchoffs Voltage Law (KVL):Įquation of voltage current relation of circuit elements: The following equation is given by Kirchoffs Current Law (KCL): is analyzed, and some useful formulas are obtained: The basic voltage divider circuit with two resistors in series as shown in the Figure 2. It is a simple circuit which turns a large voltage into a smaller one. In electronics, a voltage divider (also known as a potential divider) is a passive linear circuit that produces an output voltage that is a fraction of its input voltage. This article contains plenty of equations based on Kirchhoff's current law and Ohm's law for you to master voltage divider and current divider circuits.Ī Discussion of the Useful Voltage Divider and Current Divider Circuits. In this section, through the discussion of the commonly used resistor series voltage divider circuit and resistors in parallel divider circuit to find their rules. Ⅳ Frequently Asked Questions about Resistor Voltage Divider and Current Divider Rules and Formulas Voltage and Current Divider Current Circuits Therefore, there is no need to find the voltage of each resistor, so that the branch current can be easily found by Kirchhoff's current law (KCL) and Ohm's law.įigure 1. The main feature of a parallel circuit is that, although the branch circuit currents are different, the voltages of all connection paths are the same. While a voltage divider circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. However, the current through each component can have a different value. This results in the current to flow or pass through different paths and branches.

In a parallel circuit, the terminals of all components are connected together, sharing the same two end nodes. The current divider circuit is a parallel circuit in which the source current or power supply current divided into a multiple parallel paths.

Current divider equations and voltage divider formulas help you better understand resistor functions in electronic circuits.