What is Voltage Divider or Division Rule? with Formula and Example

Generally, we need the Voltage division Formula where there is a Series network of the different elements like Resistor, Capacitor, or Inductor. We can use the Voltage Divider/Division Rule to find the voltage across each element of the circuit easily with examples. Then there is no need to apply KCL (Kirchhoff’s current law) and KVL (Kirchhoff’s voltage law) many times.

What is the voltage Divider or Division Rule?

According to the Voltage Divider or Division rule, the voltage of each series component of the circuit is a fraction of the total voltage input to the circuit. There is no difference between the Voltage divider and the voltage division.

Alternatively, if we have a series of resistors then the voltage across a resistor will be given by the voltage of that resistor and divided by the sum of the parallel resistors. this is called voltage division or divider rule.

Formula for the voltage division or divider rule

The voltage divider or division rule applies to any of the passive element loads. Collectively also we can calculate it for the multiple elements in one branch too by finding the impedance of the branch. Some of the basic examples with the formula of the voltage divider or division rule are below.

Examples of circuit voltage divider or division rule

Finally, if the circuit is having series of elements of the same impedance. Then by this rule, they will have the same voltages across them.

Voltage division across two equal resistances in series

Remember if there are two series elements of the same resistance. Then voltage across them will be the same. That is V/2 in each. Conclusively, potential difference is same in parallel combination not in series combination of the resistors.

Voltage division across three equal resistances in series

If there are three series elements of resistance or impedance. Then voltage across them will be the same. That is V/3 in each.

How does voltage divides in a series circuit?

Voltage in a series circuit is divided depending upon the impedance of each element. An element having a larger impedance will have a larger voltage drop across it. Whereas an element having lesser impedance will have a lesser voltage drop across it. So it does not violates KCL and KVL.

Voltage divider or division is also known as potential dividers.

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