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Voltage Divider Calculator

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This online calculator helps to determine  the output voltage of a voltage divider circuit. Simply we can say that this circuit consists of two resistors and an input voltage. These resistors are connected in series. The schematics of the electrical circuit is

Voltage Divider Circuit

The mathematical representation of the output voltage is,
$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in}$
 

Steps

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Step 1 : Put down the parameters given in the question.

Step 2 : Plug these quantities in the formula and find out the required parameter

$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in}$.

Problems

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Let us discuss the problems related to voltage divider.

Solved Examples

Question 1: The value of two resistors which are connected in series are given as 5$\Omega $ and 3$\Omega $ respectively. If the input voltage of the given circuit is given as 15V, calculate the output voltage.

Solution:
 
Given parameters are,
$R_{a}$ = 5Ω,
$R_{b}$ = 3Ω,
$V_{in}$ = 15V

Output Voltage of the circuit is,

$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in}$

$V_{out}$ = $\frac{3}{5 + 3}$$\times$ 15 = 5.625V

 

Question 2: $R_{a}$ and $R_{b}$ of a voltage divider circuit is given as 2$\Omega$ and 4$\Omega$ respectively. If the input voltage of the given circuit is given as 12V, calculate the output voltage.

Solution:
 
Given parameters are,
$R_{a}$ = 2Ω,
$R_{b}$ = 4Ω,
$V_{in}$ = 12V

Output Voltage of the circuit is,

$V_{out}$ = $\frac{R_{b}}{R_{a}+R_{b}}$$\times V_{in}$

$V_{out}$ = $\frac{4}{2 + 4}$$\times$ 12 = 8V