The Voltage Dividers are a fundamental circuit of electrical function. It is an easy circuit. It only works on the series connection. Voltage dividers use resistors to turn a high voltage into a lower voltage. This blog will help you know everything about the voltage divider.

Table of Contents

## What Is Voltage Divider?

A voltage divider is a fundamental circuit of the electrical sector that can divide the voltage in the series circuits. It can divide the voltage among the number of resistance based on the input current. Accumulation of all voltage drops is the same as the total voltage of the source.

## How Do Voltage Dividers Work?

A voltage divider uses two series resistor and also an input voltage. Using a Voltage Divider, we can create the fraction of the input voltage as an output voltage. So, the leading working theory of a voltage divider circuit is to turn a large voltage into a smaller one.

## Circuit Diagram of Voltage Divider

The circuit of the voltage divider is straightforward to recognize. There are two kinds of voltage dividers. One is the output under load, and another is under no load. Both of the circuit diagram details are given below:

In the open circuits, the current flows positive towards negative. The voltage is defined as V_{1}. In the open circuits, R_{1 }and R_{2 }_{ }are connected with a series connection.

There is no limit to the connection. Circuits can be made by adding as many resistors as you want. Adding more resistance increases the voltage drop. Here the output of R_{1 }and R_{2} is open.

In the loaded circuit, the current flows positive towards negative. The voltage is defined as V_{1}. In the loaded circuit, R_{2 }and R_{L }_{ }are connected with parallel connections. This parallel connection is again connected in class with R_{1}. Here the output of R_{1 }and R_{2} are connected with a load of R_{L}.

### Output Voltage Under No Load

Here the circuit is not connected with the load. If it is connected with the load, then increase the voltage drop. we can calculate the voltage drop of each resistance by a formula. Circuits can be made by adding as many resistors as you want. Then it is defined as R_{1, }R_{2, }R_{3, }R_{4, }R_{5, }R_{6,… }The formula is given below:

**V**_{output }= **V _{1}*R_{2 }/ (R_{1}+R_{2})**

In this formula, the voltage and the last resistance are multiplied. And it is divided by the sum of the total resistance. Below this picture contains two resistance, which is R_{1 }and R_{2.}

**Example:** Here the is V_{1}= 12v. R_{1 }and R_{2} are 3Ω and 6Ω. Calculate the output voltage(V_{2}).

**Solve:** V_{1}= V* (R_{1}/ R_{1}+R_{2})= 12*(3/9)= 4v

and **V _{2}**= V* (R

_{2}/ R

_{1}+R

_{2})= 12*(6/9)=

**8v**

### Output Voltage Under Load

Here the circuit is connected with the load. If it is not connected with the load then decrease the voltage drop. we can calculate the voltage drop of R_{L} by a formula. Circuits can be made by adding as many resistors as you want. Then it is defined as R_{1, }R_{2, }R_{3, }R_{4, }R_{5, }R_{6,… }The formula is given below:

In this circuit, R_{2} and R_{L} are connected with a parallel connection. R_{1 }and the sum of R_{2}+R_{L} are connected with a series connection. This circuit is calculated in two steps for easily getting. On the first, calculated the parallel connection and then calculated the series connection of voltage drop. An example is given below:

**Example:** Here, the is V_{1}= 10v. R_{1}, R_{2,} and R_{L} are 4Ω, 2Ω and 3Ω. Calculate the output voltage of R_{L.}

**Solve: **According to the parallel connection,**R _{P}**= (R

_{2}* R

_{L})/ (R

_{2}+R

_{L})= (2*3)/ (2+3)= 6/5Ω

Now the current flow (I^) between R_{1} and 6/5Ω is, I^= V /(R_{1}+6/5)= 10/(4+6/5)= 25/13

**I**= I^ * R_{2}/ (R_{2}+R_{L}) **(Opposite resistance/ sum of resistance)**

= (25/13) * 2/(2+3)

=**10/13**

This is the absolute value of R_{L}

### Uses of Voltage Divider

Voltage divider uses for various purposes in the sector of electricity. Some of the important uses are given below:

- The measure of high voltage current and used to compensate for capacitive voltage.
- Make adjustments to the signal of the current.
- Uses to make the Multimeter and Wheatstone.
- Work as signal attenuators.
- Uses in the low frequencies and DC connections.
- It is also used in power transformers.

## Advantages And Disadvantages of Voltage Dividers

A voltage divider has an advantage and disadvantages. Now it describes in below:

**Advantages:** The main advantage of the voltage divider is to give compensation for the current flow. It has fewer voltage drops and provides DC with independence. The installation of the voltage divider is straightforward.

**Disadvantage:** When it works its become hot and loses its working efficiency. It is often spoiled.

The voltage divider is an essential device for decreasing the voltage to the source. Many electrical devices work at a low voltage; the voltage divider ensures this voltage. Although it has some restrictions, it works continuously. It is the benediction of the electric sector.